25666172 has 12 divisors (see below), whose sum is σ = 51332400. Its totient is φ = 10999776.

The previous prime is 25666153. The next prime is 25666181. The reversal of 25666172 is 27166652.

25666172 is an admirable number.

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, 458297 + ... + 458352.

It is an arithmetic number, because the mean of its divisors is an integer number (4277700).

Almost surely, 2^25666172 is an apocalyptic number.

It is an amenable number.

25666172 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25666172 is a wasteful number, since it uses less digits than its factorization.

25666172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916660 (or 916658 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 25666172 is about 5066.1792309392. The cubic root of 25666172 is about 294.9762386300.

The spelling of 25666172 in words is "twenty-five million, six hundred sixty-six thousand, one hundred seventy-two".