674991668 has 24 divisors (see below), whose sum is σ = 1272808320. Its totient is φ = 311361120.

The previous prime is 674991643. The next prime is 674991677. The reversal of 674991668 is 866199476.

It is a super-2 number, since 2×674991668² = 911227503738844448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170633 + ... + 174543.

It is an arithmetic number, because the mean of its divisors is an integer number (53033680).

Almost surely, 2^674991668 is an apocalyptic number.

It is an amenable number.

674991668 is a deficient number, since it is larger than the sum of its proper divisors (597816652).

674991668 is a wasteful number, since it uses less digits than its factorization.

674991668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247 (or 7245 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 56.

The square root of 674991668 is about 25980.6017636236. The cubic root of 674991668 is about 877.2017121282.

The spelling of 674991668 in words is "six hundred seventy-four million, nine hundred ninety-one thousand, six hundred sixty-eight".