1. Numbers
  2. Compare 61 vs 66

Compare 61 vs 66

Property6166
Typeprimecomposite number
Unique factors13
Total factors13
Prime factorization61121 × 31 × 111
Prime factorization612 × 3 × 11
Divisors count28
Divisors1, 611, 2, 3, 6, 11, 22, 33, 66
Number of properties120
Additive primes11th 
Centered decagonal primes3rd 
Centered square primes4th 
Cuban primes 14th 
Long primes8th 
Primes18th 
Pythagorean primes8th 
Sexy primes (1st member)12th 
Sexy prime quadrupletss (1st member)4th 
Sexy prime triplets (1st member)8th 
Solinas primes15th 
Twin primes (2nd member)7th 
Roman numberalsLXILXVI
Base 2111101210000102
Base 32021321103
Base 4331410024
Base 522152315
Base 614161506
Base 711571237
Base 87581028
Base 9679739
Base 1061106610
Base 1156116011
Base 1251125612
Base 1349135113
Base 1445144a14
Base 1541154615
Base 163d164216
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