684555674 has 16 divisors (see below), whose sum is σ = 1179139680. Its totient is φ = 294784560.

The previous prime is 684555629. The next prime is 684555689. The reversal of 684555674 is 476555486.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818429 + ... + 819264.

It is an arithmetic number, because the mean of its divisors is an integer number (73696230).

Almost surely, 2^684555674 is an apocalyptic number.

684555674 is a deficient number, since it is larger than the sum of its proper divisors (494584006).

684555674 is a wasteful number, since it uses less digits than its factorization.

684555674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637725.

The product of its digits is 4032000, while the sum is 50.

The square root of 684555674 is about 26164.0148677530. The cubic root of 684555674 is about 881.3253419548.

The spelling of 684555674 in words is "six hundred eighty-four million, five hundred fifty-five thousand, six hundred seventy-four".