25166660532 has 48 divisors (see below), whose sum is σ = 66959266752. Its totient is φ = 7288081920.

The previous prime is 25166660509. The next prime is 25166660567. The reversal of 25166660532 is 23506666152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4742194 + ... + 4747497.

It is an arithmetic number, because the mean of its divisors is an integer number (1394984724).

Almost surely, 2^25166660532 is an apocalyptic number.

It is an amenable number.

25166660532 is an abundant number, since it is smaller than the sum of its proper divisors (41792606220).

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

25166660532 is a wasteful number, since it uses less digits than its factorization.

25166660532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489728 (or 9489726 counting only the distinct ones).

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

The spelling of 25166660532 in words is "twenty-five billion, one hundred sixty-six million, six hundred sixty thousand, five hundred thirty-two".