Compare 6 vs 7

Property	6	7
Type	semiprime	prime
Unique factors	2	1
Total factors	2	1
Prime factorization	2¹ × 3¹	7¹
Prime factorization	2 × 3	7
Divisors count	4	2
Divisors	1, 2, 3, 6	1, 7
Number of properties	1	37
Additive primes		4th
Carol primes		1st
Chen primes		4th
Class 1+ primes		4th
Cousin primes (1st member)		2nd
Cousin primes (2nd member)		1st
Cuban primes 1		1st
Double mersenne primes		1st
Euclid primes		3rd
Factorial primes		4th
Happy primes		1st
Kynea primes		2nd
Left-truncatable primes		4th
Long primes		1st
Lucas primes		3rd
Lucky primes		2nd
Mersenne primes		2nd
Multiplicative primes		4th
Palindromic primes		4th
Pierpont primes		4th
Pierpont primes of the 2nd kind		4th
Primes		4th
Prime quadruplets (2nd member)		1st
Prime quintuplet 1s (1st member)		1st
Prime quintuplet 2s (2nd member)		1st
Prime sextuplets (1st member)		1st
Prime triplets (1st member)		2nd
Prime triplets (2nd member)		1st
Right-truncatable primes		4th
Safe primes		2nd
Semiprimes	2nd
Sexy primes (1st member)		2nd
Sexy prime triplets (1st member)		2nd
Solinas primes		3rd
Thabit primes of the 2nd kind		1st
Twin primes (2nd member)		2nd
Two-sided primes		4th
Woodall primes		1st
Roman numberals	VI	VII
Base 2	110₂	111₂
Base 3	20₃	21₃
Base 4	12₄	13₄
Base 5	11₅	12₅
Base 6	10₆	11₆
Base 7	6₇	10₇
Base 8	6₈	7₈
Base 9	6₉	7₉
Base 10	6₁₀	7₁₀
Base 11	6₁₁	7₁₁
Base 12	6₁₂	7₁₂
Base 13	6₁₃	7₁₃
Base 14	6₁₄	7₁₄
Base 15	6₁₅	7₁₅
Base 16	6₁₆	7₁₆