667943934 has 32 divisors (see below), whose sum is σ = 1540746240. Its totient is φ = 189088992.

The previous prime is 667943929. The next prime is 667943951. The reversal of 667943934 is 439349766.

It is a super-2 number, since 2×667943934² = 892298197934792712, 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 15 ways as a sum of consecutive naturals, for example, 68374 + ... + 77529.

It is an arithmetic number, because the mean of its divisors is an integer number (48148320).

Almost surely, 2^667943934 is an apocalyptic number.

667943934 is an abundant number, since it is smaller than the sum of its proper divisors (872802306).

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

667943934 is a wasteful number, since it uses less digits than its factorization.

667943934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146024.

The product of its digits is 2939328, while the sum is 51.

The square root of 667943934 is about 25844.6113145468. The cubic root of 667943934 is about 874.1380067180.

The spelling of 667943934 in words is "six hundred sixty-seven million, nine hundred forty-three thousand, nine hundred thirty-four".