625648668 has 48 divisors (see below), whose sum is σ = 1575866880. Its totient is φ = 192601024.

The previous prime is 625648657. The next prime is 625648711. The reversal of 625648668 is 866846526.

It is a self number, because there is not a number n which added to its sum of digits gives 625648668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31080 + ... + 47087.

It is an arithmetic number, because the mean of its divisors is an integer number (32830560).

Almost surely, 2^625648668 is an apocalyptic number.

It is an amenable number.

625648668 is an abundant number, since it is smaller than the sum of its proper divisors (950218212).

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

625648668 is a wasteful number, since it uses less digits than its factorization.

625648668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78226 (or 78224 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The square root of 625648668 is about 25012.9699955843. The cubic root of 625648668 is about 855.2836595147.

The spelling of 625648668 in words is "six hundred twenty-five million, six hundred forty-eight thousand, six hundred sixty-eight".