667791338 has 8 divisors (see below), whose sum is σ = 1045238688. Its totient is φ = 319378444.

The previous prime is 667791259. The next prime is 667791343. The reversal of 667791338 is 833197766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×667791338² = 891890542215660488, which contains 22 as substring.

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, 7258556 + ... + 7258647.

It is an arithmetic number, because the mean of its divisors is an integer number (130654836).

Almost surely, 2^667791338 is an apocalyptic number.

667791338 is a deficient number, since it is larger than the sum of its proper divisors (377447350).

667791338 is a wasteful number, since it uses less digits than its factorization.

667791338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14517228.

The product of its digits is 1143072, while the sum is 50.

The square root of 667791338 is about 25841.6589637740. The cubic root of 667791338 is about 874.0714342031.

The spelling of 667791338 in words is "six hundred sixty-seven million, seven hundred ninety-one thousand, three hundred thirty-eight".