25668656 has 20 divisors (see below), whose sum is σ = 53559072. Its totient is φ = 11846976.

The previous prime is 25668653. The next prime is 25668661. The reversal of 25668656 is 65686652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25668653) 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, 61496 + ... + 61911.

Almost surely, 2^25668656 is an apocalyptic number.

25668656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25668656 is an abundant number, since it is smaller than the sum of its proper divisors (27890416).

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

25668656 is a wasteful number, since it uses less digits than its factorization.

25668656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123428 (or 123422 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 25668656 is about 5066.4243801719. The cubic root of 25668656 is about 294.9857543633.

The spelling of 25668656 in words is "twenty-five million, six hundred sixty-eight thousand, six hundred fifty-six".