Compare 665980 vs 665981

Property	665980	665981
Type	composite number	prime
Unique factors	5	1
Total factors	6	1
Prime factorization	2² × 5¹ × 7¹ × 67¹ × 71¹	665981¹
Prime factorization	2 × 2 × 5 × 7 × 67 × 71	665981
Divisors count	48	2
Divisors	1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 71, 134, 140, 142, 268, 284, 335, 355, 469, 497, 670, 710, 938, 994, 1340, 1420, 1876, 1988, 2345, 2485, 4690, 4757, 4970, 9380, 9514, 9940, 19028, 23785, 33299, 47570, 66598, 95140, 133196, 166495, 332990, 665980	1, 665981
Number of properties	0	4
Chen primes		21124th
Primes		54020th
Twin primes (1st member)		5831st
Ulam primes		3967th
Roman numberals
Base 2	10100010100101111100₂	10100010100101111101₂
Base 3	1020211112221₃	1020211112222₃
Base 4	2202211330₄	2202211331₄
Base 5	132302410₅	132302411₅
Base 6	22135124₆	22135125₆
Base 7	5442430₇	5442431₇
Base 8	2424574₈	2424575₈
Base 9	1224487₉	1224488₉
Base 10	665980₁₀	665981₁₀
Base 11	4153a7₁₁	4153a8₁₁
Base 12	2814a4₁₂	2814a5₁₂
Base 13	1a4193₁₃	1a4194₁₃
Base 14	1349c0₁₄	1349c1₁₄
Base 15	d24da₁₅	d24db₁₅
Base 16	a297c₁₆	a297d₁₆