25664672 has 24 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 11665600.

The previous prime is 25664671. The next prime is 25664689. The reversal of 25664672 is 27646652.

It is not an unprimeable number, because it can be changed into a prime (25664671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36104 + ... + 36807.

It is an arithmetic number, because the mean of its divisors is an integer number (2296728).

Almost surely, 2^25664672 is an apocalyptic number.

25664672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25664672 is an abundant number, since it is smaller than the sum of its proper divisors (29456800).

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

25664672 is a wasteful number, since it uses less digits than its factorization.

25664672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72932 (or 72924 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 25664672 is about 5066.0311882182. The cubic root of 25664672 is about 294.9704921170.

The spelling of 25664672 in words is "twenty-five million, six hundred sixty-four thousand, six hundred seventy-two".