Compare 19661 vs 19666
| Property | 19661 | 19666 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 196611 | 21 × 98331 |
| Prime factorization | 19661 | 2 × 9833 |
| Divisors count | 2 | 4 |
| Divisors | 1, 19661 | 1, 2, 9833, 19666 |
| Number of properties | 8 | 1 |
| Additive primes | 1035th | |
| Emirps | 615th | |
| Harmonic primes | 804th | |
| Isolated primes | 1555th | |
| Long primes | 851st | |
| Primes | 2226th | |
| Pythagorean primes | 1105th | |
| Semiprimes | 5008th | |
| Sophie germain primes | 320th | |
| Roman numberals | ||
| Base 2 | 1001100110011012 | 1001100110100102 |
| Base 3 | 2222220123 | 2222221013 |
| Base 4 | 103030314 | 103031024 |
| Base 5 | 11121215 | 11121315 |
| Base 6 | 2310056 | 2310146 |
| Base 7 | 1112157 | 1112237 |
| Base 8 | 463158 | 463228 |
| Base 9 | 288659 | 288719 |
| Base 10 | 1966110 | 1966610 |
| Base 11 | 1385411 | 1385911 |
| Base 12 | b46512 | b46a12 |
| Base 13 | 8c4513 | 8c4a13 |
| Base 14 | 724514 | 724a14 |
| Base 15 | 5c5b15 | 5c6115 |
| Base 16 | 4ccd16 | 4cd216 |