668973934 has 8 divisors (see below), whose sum is σ = 1003596048. Its totient is φ = 334441920.

The previous prime is 668973931. The next prime is 668973937. The reversal of 668973934 is 439379866.

It is an interprime number because it is at equal distance from previous prime (668973931) and next prime (668973937).

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

It is a super-2 number, since 2×668973934² = 895052248742872712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668973931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919 + ... + 36589.

It is an arithmetic number, because the mean of its divisors is an integer number (125449506).

Almost surely, 2^668973934 is an apocalyptic number.

668973934 is a deficient number, since it is larger than the sum of its proper divisors (334622114).

668973934 is a wasteful number, since it uses less digits than its factorization.

668973934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45050.

The product of its digits is 5878656, while the sum is 55.

The square root of 668973934 is about 25864.5304229557. The cubic root of 668973934 is about 874.5870961786.

The spelling of 668973934 in words is "six hundred sixty-eight million, nine hundred seventy-three thousand, nine hundred thirty-four".