625628668 has 36 divisors (see below), whose sum is σ = 1275127392. Its totient is φ = 267805440.

The previous prime is 625628659. The next prime is 625628669. The reversal of 625628668 is 866826526.

It is a super-2 number, since 2×625628668² = 782822460446908448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625628669) 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, 239980 + ... + 242572.

Almost surely, 2^625628668 is an apocalyptic number.

It is an amenable number.

625628668 is an abundant number, since it is smaller than the sum of its proper divisors (649498724).

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

625628668 is a wasteful number, since it uses less digits than its factorization.

625628668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842 (or 3833 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 49.

The square root of 625628668 is about 25012.5701998015. The cubic root of 625628668 is about 855.2745458506.

The spelling of 625628668 in words is "six hundred twenty-five million, six hundred twenty-eight thousand, six hundred sixty-eight".