Compare 660 vs 666

Property	660	666
Type	composite number	composite number
Unique factors	4	3
Total factors	5	4
Prime factorization	2² × 3¹ × 5¹ × 11¹	2¹ × 3² × 37¹
Prime factorization	2 × 2 × 3 × 5 × 11	2 × 3 × 3 × 37
Divisors count	24	12
Divisors	1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660	1, 2, 3, 6, 9, 18, 37, 74, 111, 222, 333, 666
Number of properties	0	0
Roman numberals	DCLX	DCLXVI
Base 2	1010010100₂	1010011010₂
Base 3	220110₃	220200₃
Base 4	22110₄	22122₄
Base 5	10120₅	10131₅
Base 6	3020₆	3030₆
Base 7	1632₇	1641₇
Base 8	1224₈	1232₈
Base 9	813₉	820₉
Base 10	660₁₀	666₁₀
Base 11	550₁₁	556₁₁
Base 12	470₁₂	476₁₂
Base 13	3ba₁₃	3c3₁₃
Base 14	352₁₄	358₁₄
Base 15	2e0₁₅	2e6₁₅
Base 16	294₁₆	29a₁₆