25661332 has 12 divisors (see below), whose sum is σ = 45028480. Its totient is φ = 12796056.

The previous prime is 25661327. The next prime is 25661341. The reversal of 25661332 is 23316652.

It is a self number, because there is not a number n which added to its sum of digits gives 25661332.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6948 + ... + 9979.

Almost surely, 2^25661332 is an apocalyptic number.

It is an amenable number.

25661332 is a deficient number, since it is larger than the sum of its proper divisors (19367148).

25661332 is a wasteful number, since it uses less digits than its factorization.

25661332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17310 (or 17308 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 25661332 is about 5065.7015308840. The cubic root of 25661332 is about 294.9576957435.

Adding to 25661332 its reverse (23316652), we get a palindrome (48977984).

The spelling of 25661332 in words is "twenty-five million, six hundred sixty-one thousand, three hundred thirty-two".