Compare 161 vs 166
| Property | 161 | 166 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 71 × 231 | 21 × 831 |
| Prime factorization | 7 × 23 | 2 × 83 |
| Divisors count | 4 | 4 |
| Divisors | 1, 7, 23, 161 | 1, 2, 83, 166 |
| Number of properties | 1 | 1 |
| Semiprimes | 54th | 55th |
| Roman numberals | CLXI | CLXVI |
| Base 2 | 101000012 | 101001102 |
| Base 3 | 122223 | 200113 |
| Base 4 | 22014 | 22124 |
| Base 5 | 11215 | 11315 |
| Base 6 | 4256 | 4346 |
| Base 7 | 3207 | 3257 |
| Base 8 | 2418 | 2468 |
| Base 9 | 1889 | 2049 |
| Base 10 | 16110 | 16610 |
| Base 11 | 13711 | 14111 |
| Base 12 | 11512 | 11a12 |
| Base 13 | c513 | ca13 |
| Base 14 | b714 | bc14 |
| Base 15 | ab15 | b115 |
| Base 16 | a116 | a616 |