667693983 has 16 divisors (see below), whose sum is σ = 987115392. Its totient is φ = 398028000.

The previous prime is 667693969. The next prime is 667694021. The reversal of 667693983 is 389396766.

It is not a de Polignac number, because 667693983 - 2⁵ = 667693951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667693913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163833 + ... + 167858.

It is an arithmetic number, because the mean of its divisors is an integer number (61694712).

Almost surely, 2^667693983 is an apocalyptic number.

667693983 is a deficient number, since it is larger than the sum of its proper divisors (319421409).

667693983 is a wasteful number, since it uses less digits than its factorization.

667693983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331766.

The product of its digits is 8817984, while the sum is 57.

The square root of 667693983 is about 25839.7752118706. The cubic root of 667693983 is about 874.0289561838.

The spelling of 667693983 in words is "six hundred sixty-seven million, six hundred ninety-three thousand, nine hundred eighty-three".