25665612 has 36 divisors (see below), whose sum is σ = 69665400. Its totient is φ = 7332864.

The previous prime is 25665593. The next prime is 25665617. The reversal of 25665612 is 21656652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25665617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21237 + ... + 22412.

It is an arithmetic number, because the mean of its divisors is an integer number (1935150).

Almost surely, 2^25665612 is an apocalyptic number.

It is an amenable number.

25665612 is an abundant number, since it is smaller than the sum of its proper divisors (43999788).

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

25665612 is a wasteful number, since it uses less digits than its factorization.

25665612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43670 (or 43661 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 25665612 is about 5066.1239621628. The cubic root of 25665612 is about 294.9740932914.

The spelling of 25665612 in words is "twenty-five million, six hundred sixty-five thousand, six hundred twelve".