Compare 668 vs 677
| Property | 668 | 677 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 3 | 1 |
| Prime factorization | 22 × 1671 | 6771 |
| Prime factorization | 2 × 2 × 167 | 677 |
| Divisors count | 6 | 2 |
| Divisors | 1, 2, 4, 167, 334, 668 | 1, 677 |
| Number of properties | 0 | 6 |
| Chen primes | 85th | |
| Cousin primes (2nd member) | 30th | |
| Isolated primes | 64th | |
| Primes | 123rd | |
| Pythagorean primes | 59th | |
| Sexy primes (1st member) | 60th | |
| Roman numberals | DCLXVIII | DCLXXVII |
| Base 2 | 10100111002 | 10101001012 |
| Base 3 | 2202023 | 2210023 |
| Base 4 | 221304 | 222114 |
| Base 5 | 101335 | 102025 |
| Base 6 | 30326 | 30456 |
| Base 7 | 16437 | 16557 |
| Base 8 | 12348 | 12458 |
| Base 9 | 8229 | 8329 |
| Base 10 | 66810 | 67710 |
| Base 11 | 55811 | 56611 |
| Base 12 | 47812 | 48512 |
| Base 13 | 3c513 | 40113 |
| Base 14 | 35a14 | 36514 |
| Base 15 | 2e815 | 30215 |
| Base 16 | 29c16 | 2a516 |