Compare 66 vs 69
| Property | 66 | 69 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 21 × 31 × 111 | 31 × 231 |
| Prime factorization | 2 × 3 × 11 | 3 × 23 |
| Divisors count | 8 | 4 |
| Divisors | 1, 2, 3, 6, 11, 22, 33, 66 | 1, 3, 23, 69 |
| Number of properties | 0 | 1 |
| Semiprimes | 24th | |
| Roman numberals | LXVI | LXIX |
| Base 2 | 10000102 | 10001012 |
| Base 3 | 21103 | 21203 |
| Base 4 | 10024 | 10114 |
| Base 5 | 2315 | 2345 |
| Base 6 | 1506 | 1536 |
| Base 7 | 1237 | 1267 |
| Base 8 | 1028 | 1058 |
| Base 9 | 739 | 769 |
| Base 10 | 6610 | 6910 |
| Base 11 | 6011 | 6311 |
| Base 12 | 5612 | 5912 |
| Base 13 | 5113 | 5413 |
| Base 14 | 4a14 | 4d14 |
| Base 15 | 4615 | 4915 |
| Base 16 | 4216 | 4516 |