Compare 666661 vs 666671

Property	666661	666671
Type	semiprime	prime
Unique factors	2	1
Total factors	2	1
Prime factorization	379¹ × 1759¹	666671¹
Prime factorization	379 × 1759	666671
Divisors count	4	2
Divisors	1, 379, 1759, 666661	1, 666671
Number of properties	1	4
Chen primes		21140th
Cousin primes (2nd member)		5831st
Isolated primes		42398th
Primes		54071st
Semiprimes	142598th
Roman numberals
Base 2	10100010110000100101₂	10100010110000101111₂
Base 3	1020212111011₃	1020212111112₃
Base 4	2202300211₄	2202300233₄
Base 5	132313121₅	132313141₅
Base 6	22142221₆	22142235₆
Base 7	5444422₇	5444435₇
Base 8	2426045₈	2426057₈
Base 9	1225434₉	1225445₉
Base 10	666661₁₀	666671₁₀
Base 11	415966₁₁	415975₁₁
Base 12	281971₁₂	28197b₁₂
Base 13	1a4598₁₃	1a45a5₁₃
Base 14	134d49₁₄	134d55₁₄
Base 15	d27e1₁₅	d27eb₁₅
Base 16	a2c25₁₆	a2c2f₁₆