Compare 666639 vs 666647

Property	666639	666647
Type	composite number	prime
Unique factors	2	1
Total factors	3	1
Prime factorization	3² × 74071¹	666647¹
Prime factorization	3 × 3 × 74071	666647
Divisors count	6	2
Divisors	1, 3, 9, 74071, 222213, 666639	1, 666647
Number of properties	0	6
Chen primes		21139th
Cousin primes (2nd member)		5830th
Primes		54068th
Prime triplets (2nd member)		2130th
Safe primes		3122nd
Twin primes (1st member)		5837th
Roman numberals
Base 2	10100010110000001111₂	10100010110000010111₂
Base 3	1020212110100₃	1020212110122₃
Base 4	2202300033₄	2202300113₄
Base 5	132313024₅	132313042₅
Base 6	22142143₆	22142155₆
Base 7	5444361₇	5444402₇
Base 8	2426017₈	2426027₈
Base 9	1225410₉	1225418₉
Base 10	666639₁₀	666647₁₀
Base 11	415946₁₁	415953₁₁
Base 12	281953₁₂	28195b₁₂
Base 13	1a457c₁₃	1a4587₁₃
Base 14	134d31₁₄	134d39₁₄
Base 15	d27c9₁₅	d27d2₁₅
Base 16	a2c0f₁₆	a2c17₁₆