25661996 has 12 divisors (see below), whose sum is σ = 45144960. Its totient is φ = 12763440.

The previous prime is 25661981. The next prime is 25662037. The reversal of 25661996 is 69916652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16031 + ... + 17558.

It is an arithmetic number, because the mean of its divisors is an integer number (3762080).

Almost surely, 2^25661996 is an apocalyptic number.

It is an amenable number.

25661996 is a deficient number, since it is larger than the sum of its proper divisors (19482964).

25661996 is a wasteful number, since it uses less digits than its factorization.

25661996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33784 (or 33782 counting only the distinct ones).

The product of its digits is 174960, while the sum is 44.

The square root of 25661996 is about 5065.7670692601. The cubic root of 25661996 is about 294.9602397816.

The spelling of 25661996 in words is "twenty-five million, six hundred sixty-one thousand, nine hundred ninety-six".