Compare 660661 vs 660670
| Property | 660661 | 660670 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 6606611 | 21 × 51 × 660671 |
| Prime factorization | 660661 | 2 × 5 × 66067 |
| Divisors count | 2 | 8 |
| Divisors | 1, 660661 | 1, 2, 5, 10, 66067, 132134, 330335, 660670 |
| Number of properties | 3 | 0 |
| Centered decagonal primes | 153rd | |
| Primes | 53621st | |
| Twin primes (2nd member) | 5785th | |
| Roman numberals | ||
| Base 2 | 101000010100101101012 | 101000010100101111102 |
| Base 3 | 10201200202213 | 10201200210213 |
| Base 4 | 22011023114 | 22011023324 |
| Base 5 | 1321201215 | 1321201405 |
| Base 6 | 220543416 | 220543546 |
| Base 7 | 54210617 | 54211037 |
| Base 8 | 24122658 | 24122768 |
| Base 9 | 12162279 | 12162379 |
| Base 10 | 66066110 | 66067010 |
| Base 11 | 41140111 | 41140a11 |
| Base 12 | 27a3b112 | 27a3ba12 |
| Base 13 | 1a193113 | 1a193a13 |
| Base 14 | 132aa114 | 132aaa14 |
| Base 15 | d0b4115 | d0b4a15 |
| Base 16 | a14b516 | a14be16 |