Compare 648 vs 660
| Property | 648 | 660 |
|---|---|---|
| Type | composite number | composite number |
| Unique factors | 2 | 4 |
| Total factors | 7 | 5 |
| Prime factorization | 23 × 34 | 22 × 31 × 51 × 111 |
| Prime factorization | 2 × 2 × 2 × 3 × 3 × 3 × 3 | 2 × 2 × 3 × 5 × 11 |
| Divisors count | 20 | 24 |
| Divisors | 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 81, 108, 162, 216, 324, 648 | 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660 |
| Number of properties | 0 | 0 |
| Roman numberals | DCXLVIII | DCLX |
| Base 2 | 10100010002 | 10100101002 |
| Base 3 | 2200003 | 2201103 |
| Base 4 | 220204 | 221104 |
| Base 5 | 100435 | 101205 |
| Base 6 | 30006 | 30206 |
| Base 7 | 16147 | 16327 |
| Base 8 | 12108 | 12248 |
| Base 9 | 8009 | 8139 |
| Base 10 | 64810 | 66010 |
| Base 11 | 53a11 | 55011 |
| Base 12 | 46012 | 47012 |
| Base 13 | 3ab13 | 3ba13 |
| Base 14 | 34414 | 35214 |
| Base 15 | 2d315 | 2e015 |
| Base 16 | 28816 | 29416 |