Compare 6661 vs 6662
| Property | 6661 | 6662 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 66611 | 21 × 33311 |
| Prime factorization | 6661 | 2 × 3331 |
| Divisors count | 2 | 4 |
| Divisors | 1, 6661 | 1, 2, 3331, 6662 |
| Number of properties | 11 | 1 |
| Additive primes | 428th | |
| Centered decagonal primes | 23rd | |
| Chen primes | 469th | |
| Happy primes | 147th | |
| Harmonic primes | 312th | |
| Long primes | 329th | |
| Lucky primes | 160th | |
| Primes | 859th | |
| Pythagorean primes | 423rd | |
| Semiprimes | 1791st | |
| Super primes | 149th | |
| Twin primes (2nd member) | 153rd | |
| Roman numberals | ||
| Base 2 | 11010000001012 | 11010000001102 |
| Base 3 | 1000102013 | 1000102023 |
| Base 4 | 12200114 | 12200124 |
| Base 5 | 2031215 | 2031225 |
| Base 6 | 505016 | 505026 |
| Base 7 | 252647 | 252657 |
| Base 8 | 150058 | 150068 |
| Base 9 | 101219 | 101229 |
| Base 10 | 666110 | 666210 |
| Base 11 | 500611 | 500711 |
| Base 12 | 3a3112 | 3a3212 |
| Base 13 | 305513 | 305613 |
| Base 14 | 25db14 | 25dc14 |
| Base 15 | 1e9115 | 1e9215 |
| Base 16 | 1a0516 | 1a0616 |