Compare 657 vs 661

Property	657	661
Type	composite number	prime
Unique factors	2	1
Total factors	3	1
Prime factorization	3² × 73¹	661¹
Prime factorization	3 × 3 × 73	661
Divisors count	6	2
Divisors	1, 3, 9, 73, 219, 657	1, 661
Number of properties	0	5
Additive primes		65th
Centered decagonal primes		8th
Primes		121st
Pythagorean primes		57th
Twin primes (2nd member)		30th
Roman numberals	DCLVII	DCLXI
Base 2	1010010001₂	1010010101₂
Base 3	220100₃	220111₃
Base 4	22101₄	22111₄
Base 5	10112₅	10121₅
Base 6	3013₆	3021₆
Base 7	1626₇	1633₇
Base 8	1221₈	1225₈
Base 9	810₉	814₉
Base 10	657₁₀	661₁₀
Base 11	548₁₁	551₁₁
Base 12	469₁₂	471₁₂
Base 13	3b7₁₃	3bb₁₃
Base 14	34d₁₄	353₁₄
Base 15	2dc₁₅	2e1₁₅
Base 16	291₁₆	295₁₆