666 is the natural number following 665 and preceding 667. It is also an abundant number. It is the sum of the first 36 natural numbers (i.e. 1 + 2 + 3 + ... + 34 + 35 + 36 = 666), and thus a triangular number. Since 36 is both square and triangular, 666 is the sixth number of the form n2(n2 + 1) / 2 (sequence A037270 in OEIS) and the eighth number of the form n(n + 1)(n2 + n + 2) / 8 (doubly triangular numbers, A002817).
The number of prime numbers up to 666 is 121, the square of the number of prime numbers up to 36.
666 is the 60th 12-factored number; 60 is the first 12-factored number.
666=(36) − (26) + 1; 6=(32) − (22) + 1; 66=(34) − (24) + 1.
666 is the sum of the squares of the first seven prime numbers (i.e. 22 + 32 + 52 + 72 + 112 + 132 + 172 = 666).
The harmonic mean of the decimal digits of 666 is (trivially -- all repdigit natural numbers have this property) an integer: 3/(1/6 + 1/6 + 1/6) = 6, making 666 the 54th number with this property.
In base 10, 666 is a palindromic number, a repdigit and a Smith number. A prime reciprocal magic square based on 1/149 in base 10 has a magic total of 666.
The Roman numeral representation of the number 666 (DCLXVI) uses once each the Roman numeral symbols with values under 1,000, occurring in descending order of their respective values (D = 500, C = 100, L = 50, X = 10, V = 5, I = 1).
666 is a member of the Indices of prime Padovan sequence, 3, 4, 5, 7, 8, 14, 19, 30, 37, 84, 128, 469, 666, 1262, 1573, 2003, 2210, ... (sequence A112882 in OEIS).
(if cant do math)
In the Bible, the Book of Revelation (13:17-1 cool cryptically asserts 666 to be "the number of a man," associated with the beast, an antagonistic creature that appears briefly about two-thirds into the apocalyptic vision. The calculation of the number was a challenge that has inspired many would-be mystics and prophets ever since.
In modern popular culture, 666 has become one of the most widely recognized symbols for the Antichrist or, alternately, the Devil. Earnest references to 666 occur both among apocalypticist Christian groups and in explicitly anti-Christian subcultures, such as that surrounding some heavy metal bands. An appearance of the number 666 in contemporary Western art or literature is, more likely than not, an intentional reference to this number of the Beast symbolism. Such popular references to 666 are too numerous to list.
It is not uncommon to see the symbolic role of the integer 666 transferred to the digit sequence 6-6-6. Some people take the satanic associations of 666 so seriously that they actively avoid things related to 666 or the digits 6-6-6. This is known as hexakosioihexekontahexaphobia
Hexakosioihexekontahexaphobia (pronounced hexa-koseeo-ee-hexe-konta-hexaphobia) (literally, "fear of [the number] six hundred sixty-six" wink is the fear that originated from the Biblical verse Revelation 13:18 which indicates that the number 666 is the Number of the Beast, linked to Satan or the Anti-Christ.[3]
Outside the Christian faith, the phobia has been further popularized as a motif in various horror films. Hexakosioihexekontahexaphobes will strongly avoid things related to the number 666. A prominent example is of Nancy and Ronald Reagan who, in 1989, when moving to their home in the Bel-Air section of Los Angeles, had the address of 666 St. Cloud Road changed to 668 St. Cloud Road.[4] Some women also expressed concern on giving birth to a child on June 6, 2006 (abbreviated 6/6/06).[5]
In 2006, the BBC listed Hexakosioihexekontahexaphobia and its definition as fact #64 in its "100 things we didn't know this time last year".[6]
(GAIA wanted to ban this....but then i payed them normal price and they allowed me to put it)
avondale napyeer Community Member 
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