Compare 1661 vs 1662
| Property | 1661 | 1662 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 111 × 1511 | 21 × 31 × 2771 |
| Prime factorization | 11 × 151 | 2 × 3 × 277 |
| Divisors count | 4 | 8 |
| Divisors | 1, 11, 151, 1661 | 1, 2, 3, 6, 277, 554, 831, 1662 |
| Number of properties | 1 | 0 |
| Semiprimes | 479th | |
| Roman numberals | MDCLXI | MDCLXII |
| Base 2 | 110011111012 | 110011111102 |
| Base 3 | 20211123 | 20211203 |
| Base 4 | 1213314 | 1213324 |
| Base 5 | 231215 | 231225 |
| Base 6 | 114056 | 114106 |
| Base 7 | 45627 | 45637 |
| Base 8 | 31758 | 31768 |
| Base 9 | 22459 | 22469 |
| Base 10 | 166110 | 166210 |
| Base 11 | 128011 | 128111 |
| Base 12 | b6512 | b6612 |
| Base 13 | 9aa13 | 9ab13 |
| Base 14 | 86914 | 86a14 |
| Base 15 | 75b15 | 75c15 |
| Base 16 | 67d16 | 67e16 |