624664 has 16 divisors (see below), whose sum is σ = 1183320. Its totient is φ = 309120.

The previous prime is 624649. The next prime is 624667. The reversal of 624664 is 466426.

It is a super-2 number, since 2×624664² = 780410225792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (624667) by changing a digit.

624664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559 + ... + 1249.

2⁶²⁴⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

624664 is a deficient number, since it is larger than the sum of its proper divisors (558656).

624664 is a wasteful number, since it uses less digits than its factorization.

624664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 806 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 624664 is about 790.3568814150. The cubic root of 624664 is about 85.4834732029.

The spelling of 624664 in words is "six hundred twenty-four thousand, six hundred sixty-four".