25664933 has 4 divisors (see below), whose sum is σ = 29331360. Its totient is φ = 21998508.

The previous prime is 25664929. The next prime is 25664959. The reversal of 25664933 is 33946652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25664933 - 2² = 25664929 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25664923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833203 + ... + 1833216.

It is an arithmetic number, because the mean of its divisors is an integer number (7332840).

Almost surely, 2^25664933 is an apocalyptic number.

It is an amenable number.

25664933 is a deficient number, since it is larger than the sum of its proper divisors (3666427).

25664933 is an equidigital number, since it uses as much as digits as its factorization.

25664933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666426.

The product of its digits is 116640, while the sum is 38.

The square root of 25664933 is about 5066.0569479626. The cubic root of 25664933 is about 294.9714920264.

The spelling of 25664933 in words is "twenty-five million, six hundred sixty-four thousand, nine hundred thirty-three".