646874676 has 72 divisors (see below), whose sum is σ = 1906923200. Its totient is φ = 184817808.

The previous prime is 646874647. The next prime is 646874707. The reversal of 646874676 is 676478646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13846 + ... + 38541.

Almost surely, 2^646874676 is an apocalyptic number.

It is an amenable number.

646874676 is an abundant number, since it is smaller than the sum of its proper divisors (1260048524).

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

646874676 is a wasteful number, since it uses less digits than its factorization.

646874676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52418 (or 52399 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 54.

The square root of 646874676 is about 25433.7310672265. The cubic root of 646874676 is about 864.8485266078.

The spelling of 646874676 in words is "six hundred forty-six million, eight hundred seventy-four thousand, six hundred seventy-six".