671682568 has 16 divisors (see below), whose sum is σ = 1283167980. Its totient is φ = 329504448.

The previous prime is 671682523. The next prime is 671682587. The reversal of 671682568 is 865286176.

It can be written as a sum of positive squares in 2 ways, for example, as 644245924 + 27436644 = 25382^2 + 5238^2 .

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, 791655 + ... + 792502.

Almost surely, 2^671682568 is an apocalyptic number.

It is an amenable number.

671682568 is a deficient number, since it is larger than the sum of its proper divisors (611485412).

671682568 is a wasteful number, since it uses less digits than its factorization.

671682568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584216 (or 1584212 counting only the distinct ones).

The product of its digits is 967680, while the sum is 49.

The square root of 671682568 is about 25916.8394678055. The cubic root of 671682568 is about 875.7658896370.

The spelling of 671682568 in words is "six hundred seventy-one million, six hundred eighty-two thousand, five hundred sixty-eight".