666 (number)
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This article is about the numerical value. For the year 666 AD, see AD 666. For other uses, see 666 (disambiguation).
"1010011010" redirects here. For the song, see 1010011010 (Cog song).
666 (six hundred [and] sixty-six) is the natural number following 665 and preceding 667.
Quick Facts ← 665 666 667 →, Cardinal ...
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Cardinal | six hundred sixty-six | |||
Ordinal | 666th (six hundred sixty-sixth) | |||
Factorization | 2 × 32 × 37 | |||
Divisors | 1, 2, 3, 6, 9, 18, 37, 74, 111, 222, 333, 666 | |||
Greek numeral | ΧΞϚ´ | |||
Roman numeral | DCLXVI | |||
Greek prefix | ἑξακόσιοι ἑξήκοντα ἕξ hexakósioi hexēkonta héx | |||
Latin prefix | sescenti sexaginta sex | |||
Binary | 10100110102 | |||
Ternary | 2202003 | |||
Senary | 30306 | |||
Octal | 12328 | |||
Duodecimal | 47612 | |||
Hexadecimal | 29A16 | |||
Chinese numeral | 六百六十六 | |||
Devanagari numeral | ६६६ |
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In Christianity, 666 is referred to in (most manuscripts of) chapter 13 of the Book of Revelation of the New Testament as the "number of the beast."[1][2][3]