25536664 has 8 divisors (see below), whose sum is σ = 47881260. Its totient is φ = 12768328.

The previous prime is 25536661. The next prime is 25536673. The reversal of 25536664 is 46663552.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25536661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1596034 + ... + 1596049.

Almost surely, 2^25536664 is an apocalyptic number.

It is an amenable number.

25536664 is a deficient number, since it is larger than the sum of its proper divisors (22344596).

25536664 is a wasteful number, since it uses less digits than its factorization.

25536664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192089 (or 3192085 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 25536664 is about 5053.3814421633. The cubic root of 25536664 is about 294.4792651936.

The spelling of 25536664 in words is "twenty-five million, five hundred thirty-six thousand, six hundred sixty-four".