25655660 has 12 divisors (see below), whose sum is σ = 53876928. Its totient is φ = 10262256.

The previous prime is 25655659. The next prime is 25655699. The reversal of 25655660 is 6655652.

It is a self number, because there is not a number n which added to its sum of digits gives 25655660.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641372 + ... + 641411.

It is an arithmetic number, because the mean of its divisors is an integer number (4489744).

Almost surely, 2^25655660 is an apocalyptic number.

25655660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25655660 is an abundant number, since it is smaller than the sum of its proper divisors (28221268).

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

25655660 is a wasteful number, since it uses less digits than its factorization.

25655660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282792 (or 1282790 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 25655660 is about 5065.1416564594. The cubic root of 25655660 is about 294.9359623520.

The spelling of 25655660 in words is "twenty-five million, six hundred fifty-five thousand, six hundred sixty".