25666532 has 24 divisors (see below), whose sum is σ = 48104280. Its totient is φ = 11939840.

The previous prime is 25666477. The next prime is 25666577. The reversal of 25666532 is 23566652.

It can be written as a sum of positive squares in 4 ways, for example, as 10797796 + 14868736 = 3286^2 + 3856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25666492 and 25666501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3932 + ... + 8172.

It is an arithmetic number, because the mean of its divisors is an integer number (2004345).

Almost surely, 2^25666532 is an apocalyptic number.

It is an amenable number.

25666532 is a deficient number, since it is larger than the sum of its proper divisors (22437748).

25666532 is a wasteful number, since it uses less digits than its factorization.

25666532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351 (or 4349 counting only the distinct ones).

The product of its digits is 64800, while the sum is 35.

The square root of 25666532 is about 5066.2147605485. The cubic root of 25666532 is about 294.9776177599.

The spelling of 25666532 in words is "twenty-five million, six hundred sixty-six thousand, five hundred thirty-two".