Compare 655 vs 666
| Property | 655 | 666 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 4 |
| Prime factorization | 51 × 1311 | 21 × 32 × 371 |
| Prime factorization | 5 × 131 | 2 × 3 × 3 × 37 |
| Divisors count | 4 | 12 |
| Divisors | 1, 5, 131, 655 | 1, 2, 3, 6, 9, 18, 37, 74, 111, 222, 333, 666 |
| Number of properties | 1 | 0 |
| Semiprimes | 197th | |
| Roman numberals | DCLV | DCLXVI |
| Base 2 | 10100011112 | 10100110102 |
| Base 3 | 2200213 | 2202003 |
| Base 4 | 220334 | 221224 |
| Base 5 | 101105 | 101315 |
| Base 6 | 30116 | 30306 |
| Base 7 | 16247 | 16417 |
| Base 8 | 12178 | 12328 |
| Base 9 | 8079 | 8209 |
| Base 10 | 65510 | 66610 |
| Base 11 | 54611 | 55611 |
| Base 12 | 46712 | 47612 |
| Base 13 | 3b513 | 3c313 |
| Base 14 | 34b14 | 35814 |
| Base 15 | 2da15 | 2e615 |
| Base 16 | 28f16 | 29a16 |