Compare 163 vs 166
| Property | 163 | 166 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 1631 | 21 × 831 |
| Prime factorization | 163 | 2 × 83 |
| Divisors count | 2 | 4 |
| Divisors | 1, 163 | 1, 2, 83, 166 |
| Number of properties | 7 | 1 |
| Cousin primes (1st member) | 13th | |
| Isolated primes | 15th | |
| Lucky primes | 12th | |
| Pierpont primes | 12th | |
| Primes | 38th | |
| Semiprimes | 55th | |
| Sexy primes (2nd member) | 22nd | |
| Sexy prime triplets (3rd member) | 12th | |
| Roman numberals | CLXIII | CLXVI |
| Base 2 | 101000112 | 101001102 |
| Base 3 | 200013 | 200113 |
| Base 4 | 22034 | 22124 |
| Base 5 | 11235 | 11315 |
| Base 6 | 4316 | 4346 |
| Base 7 | 3227 | 3257 |
| Base 8 | 2438 | 2468 |
| Base 9 | 2019 | 2049 |
| Base 10 | 16310 | 16610 |
| Base 11 | 13911 | 14111 |
| Base 12 | 11712 | 11a12 |
| Base 13 | c713 | ca13 |
| Base 14 | b914 | bc14 |
| Base 15 | ad15 | b115 |
| Base 16 | a316 | a616 |