25628166 has 24 divisors (see below), whose sum is σ = 55620864. Its totient is φ = 8528400.

The previous prime is 25628143. The next prime is 25628167. The reversal of 25628166 is 66182652.

25628166 is a `hidden beast` number, since 25 + 628 + 1 + 6 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 25628166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25628167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20100 + ... + 21336.

It is an arithmetic number, because the mean of its divisors is an integer number (2317536).

Almost surely, 2^25628166 is an apocalyptic number.

25628166 is an abundant number, since it is smaller than the sum of its proper divisors (29992698).

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

25628166 is a wasteful number, since it uses less digits than its factorization.

25628166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396 (or 2393 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 25628166 is about 5062.4268883610. The cubic root of 25628166 is about 294.8305682239.

The spelling of 25628166 in words is "twenty-five million, six hundred twenty-eight thousand, one hundred sixty-six".