Compare 165 vs 166
| Property | 165 | 166 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 31 × 51 × 111 | 21 × 831 |
| Prime factorization | 3 × 5 × 11 | 2 × 83 |
| Divisors count | 8 | 4 |
| Divisors | 1, 3, 5, 11, 15, 33, 55, 165 | 1, 2, 83, 166 |
| Number of properties | 0 | 1 |
| Semiprimes | 55th | |
| Roman numberals | CLXV | CLXVI |
| Base 2 | 101001012 | 101001102 |
| Base 3 | 200103 | 200113 |
| Base 4 | 22114 | 22124 |
| Base 5 | 11305 | 11315 |
| Base 6 | 4336 | 4346 |
| Base 7 | 3247 | 3257 |
| Base 8 | 2458 | 2468 |
| Base 9 | 2039 | 2049 |
| Base 10 | 16510 | 16610 |
| Base 11 | 14011 | 14111 |
| Base 12 | 11912 | 11a12 |
| Base 13 | c913 | ca13 |
| Base 14 | bb14 | bc14 |
| Base 15 | b015 | b115 |
| Base 16 | a516 | a616 |