625665925 has 6 divisors (see below), whose sum is σ = 775825778. Its totient is φ = 500532720.

The previous prime is 625665919. The next prime is 625665947. The reversal of 625665925 is 529566526.

625665925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 168818049 + 456847876 = 12993^2 + 21374^2 .

It is not a de Polignac number, because 625665925 - 2³ = 625665917 is a prime.

It is a super-2 number, since 2×625665925² = 782915699412211250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12513294 + ... + 12513343.

Almost surely, 2^625665925 is an apocalyptic number.

It is an amenable number.

625665925 is a deficient number, since it is larger than the sum of its proper divisors (150159853).

625665925 is a wasteful number, since it uses less digits than its factorization.

625665925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25026647 (or 25026642 counting only the distinct ones).

The product of its digits is 972000, while the sum is 46.

The square root of 625665925 is about 25013.3149542399. The cubic root of 625665925 is about 855.2915230837.

The spelling of 625665925 in words is "six hundred twenty-five million, six hundred sixty-five thousand, nine hundred twenty-five".