671686804 has 12 divisors (see below), whose sum is σ = 1177355200. Its totient is φ = 335299608.

The previous prime is 671686801. The next prime is 671686811. The reversal of 671686804 is 408686176.

It is a happy number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671686801) 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, 133164 + ... + 138115.

Almost surely, 2^671686804 is an apocalyptic number.

It is an amenable number.

671686804 is a deficient number, since it is larger than the sum of its proper divisors (505668396).

671686804 is a wasteful number, since it uses less digits than its factorization.

671686804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271902 (or 271900 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 671686804 is about 25916.9211906044. The cubic root of 671686804 is about 875.7677306537.

The spelling of 671686804 in words is "six hundred seventy-one million, six hundred eighty-six thousand, eight hundred four".