667688922 has 24 divisors (see below), whose sum is σ = 1457707680. Its totient is φ = 220863240.

The previous prime is 667688893. The next prime is 667688929. The reversal of 667688922 is 229886766.

It is not an unprimeable number, because it can be changed into a prime (667688929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139222 + ... + 143937.

It is an arithmetic number, because the mean of its divisors is an integer number (60737820).

Almost surely, 2^667688922 is an apocalyptic number.

667688922 is an abundant number, since it is smaller than the sum of its proper divisors (790018758).

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

667688922 is a wasteful number, since it uses less digits than its factorization.

667688922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283298 (or 283295 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 667688922 is about 25839.6772812665. The cubic root of 667688922 is about 874.0267478509.

The spelling of 667688922 in words is "six hundred sixty-seven million, six hundred eighty-eight thousand, nine hundred twenty-two".