671489968 has 20 divisors (see below), whose sum is σ = 1357578288. Its totient is φ = 321147200.

The previous prime is 671489939. The next prime is 671489981. The reversal of 671489968 is 869984176.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911983 + ... + 912718.

Almost surely, 2^671489968 is an apocalyptic number.

It is an amenable number.

671489968 is an abundant number, since it is smaller than the sum of its proper divisors (686088320).

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

671489968 is a wasteful number, since it uses less digits than its factorization.

671489968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824732 (or 1824726 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The square root of 671489968 is about 25913.1234705506. The cubic root of 671489968 is about 875.6821751749.

The spelling of 671489968 in words is "six hundred seventy-one million, four hundred eighty-nine thousand, nine hundred sixty-eight".