Compare 661009 vs 661018
| Property | 661009 | 661018 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 6610091 | 21 × 3305091 |
| Prime factorization | 661009 | 2 × 330509 |
| Divisors count | 2 | 4 |
| Divisors | 1, 661009 | 1, 2, 330509, 661018 |
| Number of properties | 3 | 1 |
| Isolated primes | 42071st | |
| Lucky primes | 6149th | |
| Primes | 53648th | |
| Semiprimes | 141440th | |
| Roman numberals | ||
| Base 2 | 101000010110000100012 | 101000010110000110102 |
| Base 3 | 10201202012113 | 10201202020113 |
| Base 4 | 22011201014 | 22011201224 |
| Base 5 | 1321230145 | 1321230335 |
| Base 6 | 221001216 | 221001346 |
| Base 7 | 54220667 | 54221117 |
| Base 8 | 24130218 | 24130328 |
| Base 9 | 12166549 | 12166649 |
| Base 10 | 66100910 | 66101810 |
| Base 11 | 41169811 | 4116a611 |
| Base 12 | 27a64112 | 27a64a12 |
| Base 13 | 1a1b3b13 | 1a1b4713 |
| Base 14 | 132c6d14 | 132c7814 |
| Base 15 | d0cc415 | d0ccd15 |
| Base 16 | a161116 | a161a16 |