Compare 66643 vs 67139
| Property | 66643 | 67139 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 666431 | 671391 |
| Prime factorization | 66643 | 67139 |
| Divisors count | 2 | 2 |
| Divisors | 1, 66643 | 1, 67139 |
| Number of properties | 4 | 7 |
| Chen primes | 3057th | |
| Happy primes | 1031st | 1037th |
| Harmonic primes | 2494th | 2514th |
| Isolated primes | 4903rd | |
| Long primes | 2531st | |
| Primes | 6644th | 6688th |
| Safe primes | 487th | |
| Twin primes (1st member) | 875th | |
| Roman numberals | ||
| Base 2 | 100000100010100112 | 100000110010000112 |
| Base 3 | 101011020213 | 101020021223 |
| Base 4 | 1001011034 | 1001210034 |
| Base 5 | 41130335 | 41220245 |
| Base 6 | 12323116 | 12344556 |
| Base 7 | 3652037 | 3665127 |
| Base 8 | 2021238 | 2031038 |
| Base 9 | 1113679 | 1120789 |
| Base 10 | 6664310 | 6713910 |
| Base 11 | 4608511 | 4649611 |
| Base 12 | 3269712 | 32a2b12 |
| Base 13 | 2444513 | 2473713 |
| Base 14 | 1a40314 | 1a67914 |
| Base 15 | 14b2d15 | 14d5e15 |
| Base 16 | 1045316 | 1064316 |