Compare 666143 vs 666151
| Property | 666143 | 666151 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6661431 | 1571 × 42431 |
| Prime factorization | 666143 | 157 × 4243 |
| Divisors count | 2 | 4 |
| Divisors | 1, 666143 | 1, 157, 4243, 666151 |
| Number of properties | 4 | 1 |
| Cousin primes (2nd member) | 5825th | |
| Isolated primes | 42373rd | |
| Primes | 54036th | |
| Safe primes | 3118th | |
| Semiprimes | 142486th | |
| Roman numberals | ||
| Base 2 | 101000101010000111112 | 101000101010001001112 |
| Base 3 | 10202112022223 | 10202112100213 |
| Base 4 | 22022201334 | 22022202134 |
| Base 5 | 1323040335 | 1323041015 |
| Base 6 | 221355556 | 221400116 |
| Base 7 | 54430527 | 54430637 |
| Base 8 | 24250378 | 24250478 |
| Base 9 | 12246889 | 12247079 |
| Base 10 | 66614310 | 66615110 |
| Base 11 | 41553511 | 41554211 |
| Base 12 | 2815bb12 | 28160712 |
| Base 13 | 1a428a13 | 1a429513 |
| Base 14 | 134a9914 | 134aa314 |
| Base 15 | d259815 | d25a115 |
| Base 16 | a2a1f16 | a2a2716 |