556668404 has 24 divisors (see below), whose sum is σ = 1002846600. Its totient is φ = 270176256.

The previous prime is 556668391. The next prime is 556668407. The reversal of 556668404 is 404866655.

It can be written as a sum of positive squares in 4 ways, for example, as 117765904 + 438902500 = 10852^2 + 20950^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556668407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62264 + ... + 70640.

It is an arithmetic number, because the mean of its divisors is an integer number (41785275).

Almost surely, 2^556668404 is an apocalyptic number.

It is an amenable number.

556668404 is a deficient number, since it is larger than the sum of its proper divisors (446178196).

556668404 is a wasteful number, since it uses less digits than its factorization.

556668404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867 (or 8865 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 44.

The square root of 556668404 is about 23593.8213098260. The cubic root of 556668404 is about 822.6192293967.

The spelling of 556668404 in words is "five hundred fifty-six million, six hundred sixty-eight thousand, four hundred four".