56665604 has 6 divisors (see below), whose sum is σ = 99164814. Its totient is φ = 28332800.

The previous prime is 56665603. The next prime is 56665621. The reversal of 56665604 is 40656665.

It can be written as a sum of positive squares in only one way, i.e., 56100100 + 565504 = 7490^2 + 752^2 .

It is not an unprimeable number, because it can be changed into a prime (56665603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7083197 + ... + 7083204.

It is an arithmetic number, because the mean of its divisors is an integer number (16527469).

Almost surely, 2^56665604 is an apocalyptic number.

It is an amenable number.

56665604 is a deficient number, since it is larger than the sum of its proper divisors (42499210).

56665604 is a wasteful number, since it uses less digits than its factorization.

56665604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14166405 (or 14166403 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 56665604 is about 7527.6559432535. The cubic root of 56665604 is about 384.0960498301.

The spelling of 56665604 in words is "fifty-six million, six hundred sixty-five thousand, six hundred four".