25107564066 has 32 divisors (see below), whose sum is σ = 54123588288. Its totient is φ = 7718867520.

The previous prime is 25107563981. The next prime is 25107564089. The reversal of 25107564066 is 66046570152.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43005 + ... + 228176.

It is an arithmetic number, because the mean of its divisors is an integer number (1691362134).

Almost surely, 2^25107564066 is an apocalyptic number.

25107564066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25107564066 is an abundant number, since it is smaller than the sum of its proper divisors (29016024222).

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

25107564066 is a wasteful number, since it uses less digits than its factorization.

25107564066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272386.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 25107564066 in words is "twenty-five billion, one hundred seven million, five hundred sixty-four thousand, sixty-six".