25666126530 has 64 divisors (see below), whose sum is σ = 67711666176. Its totient is φ = 6174584000.

The previous prime is 25666126523. The next prime is 25666126531. The reversal of 25666126530 is 3562166652.

It is not an unprimeable number, because it can be changed into a prime (25666126531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253626 + ... + 340085.

It is an arithmetic number, because the mean of its divisors is an integer number (1057994784).

Almost surely, 2^25666126530 is an apocalyptic number.

25666126530 is an abundant number, since it is smaller than the sum of its proper divisors (42045539646).

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

25666126530 is a wasteful number, since it uses less digits than its factorization.

25666126530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593863.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 25666126530 in words is "twenty-five billion, six hundred sixty-six million, one hundred twenty-six thousand, five hundred thirty".