665422626 has 32 divisors (see below), whose sum is σ = 1498669056. Its totient is φ = 195138000.

The previous prime is 665422577. The next prime is 665422669. The reversal of 665422626 is 626224566.

It is a super-3 number, since 3×665422626³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160570 + ... + 164661.

It is an arithmetic number, because the mean of its divisors is an integer number (46833408).

Almost surely, 2^665422626 is an apocalyptic number.

665422626 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

665422626 is an abundant number, since it is smaller than the sum of its proper divisors (833246430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665422626 is a wasteful number, since it uses less digits than its factorization.

665422626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325278.

The product of its digits is 207360, while the sum is 39.

The square root of 665422626 is about 25795.7869815984. The cubic root of 665422626 is about 873.0367415772.

The spelling of 665422626 in words is "six hundred sixty-five million, four hundred twenty-two thousand, six hundred twenty-six".