627665616 has 30 divisors (see below), whose sum is σ = 1756592370. Its totient is φ = 209221824.

The previous prime is 627665609. The next prime is 627665639. The reversal of 627665616 is 616566726.

627665616 is a `hidden beast` number, since 6 + 27 + 6 + 6 + 5 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 495507600 + 132158016 = 22260^2 + 11496^2 .

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, 2179251 + ... + 2179538.

It is an arithmetic number, because the mean of its divisors is an integer number (58553079).

Almost surely, 2^627665616 is an apocalyptic number.

It is an amenable number.

627665616 is an abundant number, since it is smaller than the sum of its proper divisors (1128926754).

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

627665616 is a wasteful number, since it uses less digits than its factorization.

627665616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358803 (or 4358794 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 627665616 is about 25053.2555968281. The cubic root of 627665616 is about 856.2017531840.

The spelling of 627665616 in words is "six hundred twenty-seven million, six hundred sixty-five thousand, six hundred sixteen".