Compare 666647 vs 666671

Property	666647	666671
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	666647¹	666671¹
Prime factorization	666647	666671
Divisors count	2	2
Divisors	1, 666647	1, 666671
Number of properties	6	4
Chen primes	21139th	21140th
Cousin primes (2nd member)	5830th	5831st
Isolated primes		42398th
Primes	54068th	54071st
Prime triplets (2nd member)	2130th
Safe primes	3122nd
Twin primes (1st member)	5837th
Roman numberals
Base 2	10100010110000010111₂	10100010110000101111₂
Base 3	1020212110122₃	1020212111112₃
Base 4	2202300113₄	2202300233₄
Base 5	132313042₅	132313141₅
Base 6	22142155₆	22142235₆
Base 7	5444402₇	5444435₇
Base 8	2426027₈	2426057₈
Base 9	1225418₉	1225445₉
Base 10	666647₁₀	666671₁₀
Base 11	415953₁₁	415975₁₁
Base 12	28195b₁₂	28197b₁₂
Base 13	1a4587₁₃	1a45a5₁₃
Base 14	134d39₁₄	134d55₁₄
Base 15	d27d2₁₅	d27eb₁₅
Base 16	a2c17₁₆	a2c2f₁₆