25664265 has 48 divisors (see below), whose sum is σ = 49008960. Its totient is φ = 12320640.

The previous prime is 25664263. The next prime is 25664267. The reversal of 25664265 is 56246652.

25664265 is a `hidden beast` number, since 2 + 5 + 6 + 642 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (25664263) and next prime (25664267).

It is not a de Polignac number, because 25664265 - 2¹ = 25664263 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25664263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68619 + ... + 68991.

It is an arithmetic number, because the mean of its divisors is an integer number (1021020).

Almost surely, 2^25664265 is an apocalyptic number.

It is an amenable number.

25664265 is a deficient number, since it is larger than the sum of its proper divisors (23344695).

25664265 is a wasteful number, since it uses less digits than its factorization.

25664265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 531 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 25664265 is about 5065.9910185471. The cubic root of 25664265 is about 294.9689328578.

The spelling of 25664265 in words is "twenty-five million, six hundred sixty-four thousand, two hundred sixty-five".