25664756 has 24 divisors (see below), whose sum is σ = 49038024. Its totient is φ = 11681280.

The previous prime is 25664753. The next prime is 25664759. The reversal of 25664756 is 65746652.

It is an interprime number because it is at equal distance from previous prime (25664753) and next prime (25664759).

It can be written as a sum of positive squares in 4 ways, for example, as 3724900 + 21939856 = 1930^2 + 4684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25664753) 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, 416 + ... + 7176.

It is an arithmetic number, because the mean of its divisors is an integer number (2043251).

Almost surely, 2^25664756 is an apocalyptic number.

25664756 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25664756 is a deficient number, since it is larger than the sum of its proper divisors (23373268).

25664756 is a wasteful number, since it uses less digits than its factorization.

25664756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851 (or 6849 counting only the distinct ones).

The product of its digits is 302400, while the sum is 41.

The square root of 25664756 is about 5066.0394787250. The cubic root of 25664756 is about 294.9708139276.

The spelling of 25664756 in words is "twenty-five million, six hundred sixty-four thousand, seven hundred fifty-six".