67 (number) Guide, Meaning , Facts, Information and Description
67 is the natural number following 66 and preceding 68.
| Cardinal | sixty-seven |
| Ordinal | 67th (sixty-seventh) |
| Factorization | prime |
| Roman numeral | LXVII |
| Binary | 1000011 |
| Hexadecimal | 43 |
Mathematics
Sixty-seven is the 19th prime number (the next is 71), an irregular prime, a lucky prime, and the sum of five consecutive primes (7 + 11 + 13 + 17 + 19).
It is a discriminant to the Heegner number -67.
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Sixty-seven is also:
