25620664 has 32 divisors (see below), whose sum is σ = 51282000. Its totient is φ = 11964672.

The previous prime is 25620641. The next prime is 25620667. The reversal of 25620664 is 46602652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25620667) 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, 9942 + ... + 12250.

Almost surely, 2^25620664 is an apocalyptic number.

It is an amenable number.

25620664 is an abundant number, since it is smaller than the sum of its proper divisors (25661336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25620664 is a wasteful number, since it uses less digits than its factorization.

25620664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 25620664 is about 5061.6858851572. The cubic root of 25620664 is about 294.8017973425.

The spelling of 25620664 in words is "twenty-five million, six hundred twenty thousand, six hundred sixty-four".