25055566 has 12 divisors (see below), whose sum is σ = 39666672. Its totient is φ = 11868084.

The previous prime is 25055557. The next prime is 25055593. The reversal of 25055566 is 66555052.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16630 + ... + 18073.

It is an arithmetic number, because the mean of its divisors is an integer number (3305556).

Almost surely, 2^25055566 is an apocalyptic number.

25055566 is a deficient number, since it is larger than the sum of its proper divisors (14611106).

25055566 is a wasteful number, since it uses less digits than its factorization.

25055566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34743 (or 34724 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 25055566 is about 5005.5535158462. The cubic root of 25055566 is about 292.6182481451.

The spelling of 25055566 in words is "twenty-five million, fifty-five thousand, five hundred sixty-six".