556664 has 16 divisors (see below), whose sum is σ = 1053000. Its totient is φ = 275872.

The previous prime is 556651. The next prime is 556679. The reversal of 556664 is 466655.

556664 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 556664.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 556664.

It is an unprimeable number.

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, 959 + ... + 1425.

2⁵⁵⁶⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

556664 is a deficient number, since it is larger than the sum of its proper divisors (496336).

556664 is a wasteful number, since it uses less digits than its factorization.

556664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 618 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 556664 is about 746.0991891163. The cubic root of 556664 is about 82.2617060047.

Subtracting from 556664 its reverse (466655), we obtain a palindrome (90009).

The spelling of 556664 in words is "five hundred fifty-six thousand, six hundred sixty-four".