Compare 665981 vs 666557
| Property | 665981 | 666557 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 6659811 | 6665571 |
| Prime factorization | 665981 | 666557 |
| Divisors count | 2 | 2 |
| Divisors | 1, 665981 | 1, 666557 |
| Number of properties | 4 | 3 |
| Chen primes | 21124th | 21138th |
| Primes | 54020th | 54062nd |
| Twin primes (1st member) | 5831st | 5836th |
| Ulam primes | 3967th | |
| Roman numberals | ||
| Base 2 | 101000101001011111012 | 101000101011101111012 |
| Base 3 | 10202111122223 | 10202121000223 |
| Base 4 | 22022113314 | 22022323314 |
| Base 5 | 1323024115 | 1323122125 |
| Base 6 | 221351256 | 221415256 |
| Base 7 | 54424317 | 54442137 |
| Base 8 | 24245758 | 24256758 |
| Base 9 | 12244889 | 12253089 |
| Base 10 | 66598110 | 66655710 |
| Base 11 | 4153a811 | 41588111 |
| Base 12 | 2814a512 | 2818a512 |
| Base 13 | 1a419413 | 1a451813 |
| Base 14 | 1349c114 | 134cb314 |
| Base 15 | d24db15 | d277215 |
| Base 16 | a297d16 | a2bbd16 |