25664008 has 8 divisors (see below), whose sum is σ = 48120030. Its totient is φ = 12832000.

The previous prime is 25663993. The next prime is 25664017. The reversal of 25664008 is 80046652.

It can be written as a sum of positive squares in only one way, i.e., 15665764 + 9998244 = 3958^2 + 3162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1603993 + ... + 1604008.

Almost surely, 2^25664008 is an apocalyptic number.

It is an amenable number.

25664008 is a deficient number, since it is larger than the sum of its proper divisors (22456022).

25664008 is a wasteful number, since it uses less digits than its factorization.

25664008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208007 (or 3208003 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 25664008 is about 5065.9656532590. The cubic root of 25664008 is about 294.9679482557.

The spelling of 25664008 in words is "twenty-five million, six hundred sixty-four thousand, eight".