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| Cardinal | seventy-seven | |||
| Ordinal | 77th (seventy-seventh) | |||
| Factorization | 7 × 11 | |||
| Divisors | 1, 7, 11, 77 | |||
| Greek numeral | ΟΖ´ | |||
| Roman numeral | LXXVII | |||
| Binary | 10011012 | |||
| Ternary | 22123 | |||
| Senary | 2056 | |||
| Octal | 1158 | |||
| Duodecimal | 6512 | |||
| Hexadecimal | 4D16 | |||
77 (seventy-seven) is the natural number following 76 and preceding 78. Seventy-seven is the smallest positive integer requiring five syllables in English.