626664 has 16 divisors (see below), whose sum is σ = 1566720. Its totient is φ = 208880.

The previous prime is 626663. The next prime is 626683. The reversal of 626664 is 466626.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (626663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13032 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (97920).

2⁶²⁶⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

626664 is an abundant number, since it is smaller than the sum of its proper divisors (940056).

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

626664 is a wasteful number, since it uses less digits than its factorization.

626664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26120 (or 26116 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 626664 is about 791.6211214969. The cubic root of 626664 is about 85.5746074273.

The spelling of 626664 in words is "six hundred twenty-six thousand, six hundred sixty-four".