671620624 has 20 divisors (see below), whose sum is σ = 1304962236. Its totient is φ = 334856192.

The previous prime is 671620603. The next prime is 671620627. The reversal of 671620624 is 426026176.

It can be written as a sum of positive squares in 2 ways, for example, as 127238400 + 544382224 = 11280^2 + 23332^2 .

It is a super-3 number, since 3×671620624³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 671620624.

It is not an unprimeable number, because it can be changed into a prime (671620627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53809 + ... + 65104.

Almost surely, 2^671620624 is an apocalyptic number.

It is an amenable number.

671620624 is a deficient number, since it is larger than the sum of its proper divisors (633341612).

671620624 is a wasteful number, since it uses less digits than its factorization.

671620624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119274 (or 119268 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 671620624 is about 25915.6443871265. The cubic root of 671620624 is about 875.7389671429.

The spelling of 671620624 in words is "six hundred seventy-one million, six hundred twenty thousand, six hundred twenty-four".