Compare 65 vs 66
| Property | 65 | 66 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 51 × 131 | 21 × 31 × 111 |
| Prime factorization | 5 × 13 | 2 × 3 × 11 |
| Divisors count | 4 | 8 |
| Divisors | 1, 5, 13, 65 | 1, 2, 3, 6, 11, 22, 33, 66 |
| Number of properties | 1 | 0 |
| Semiprimes | 23rd | |
| Roman numberals | LXV | LXVI |
| Base 2 | 10000012 | 10000102 |
| Base 3 | 21023 | 21103 |
| Base 4 | 10014 | 10024 |
| Base 5 | 2305 | 2315 |
| Base 6 | 1456 | 1506 |
| Base 7 | 1227 | 1237 |
| Base 8 | 1018 | 1028 |
| Base 9 | 729 | 739 |
| Base 10 | 6510 | 6610 |
| Base 11 | 5a11 | 6011 |
| Base 12 | 5512 | 5612 |
| Base 13 | 5013 | 5113 |
| Base 14 | 4914 | 4a14 |
| Base 15 | 4515 | 4615 |
| Base 16 | 4116 | 4216 |