25666652 has 24 divisors (see below), whose sum is σ = 49835520. Its totient is φ = 11467760.

The previous prime is 25666639. The next prime is 25666661.

25666652 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2348 + ... + 7539.

It is an arithmetic number, because the mean of its divisors is an integer number (2076480).

Almost surely, 2^25666652 is an apocalyptic number.

25666652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25666652 is a deficient number, since it is larger than the sum of its proper divisors (24168868).

25666652 is a wasteful number, since it uses less digits than its factorization.

25666652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961 (or 9959 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 25666652 is about 5066.2266036963. The cubic root of 25666652 is about 294.9780774669.

The spelling of 25666652 in words is "twenty-five million, six hundred sixty-six thousand, six hundred fifty-two".