668583937 has 8 divisors (see below), whose sum is σ = 764415872. Its totient is φ = 572832000.

The previous prime is 668583917. The next prime is 668583961. The reversal of 668583937 is 739385866.

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

It is a cyclic number.

It is not a de Polignac number, because 668583937 - 2⁷ = 668583809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668583907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 36577.

It is an arithmetic number, because the mean of its divisors is an integer number (95551984).

Almost surely, 2^668583937 is an apocalyptic number.

It is an amenable number.

668583937 is a deficient number, since it is larger than the sum of its proper divisors (95831935).

668583937 is a wasteful number, since it uses less digits than its factorization.

668583937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39999.

The product of its digits is 6531840, while the sum is 55.

The square root of 668583937 is about 25856.9900993909. The cubic root of 668583937 is about 874.4171081667.

The spelling of 668583937 in words is "six hundred sixty-eight million, five hundred eighty-three thousand, nine hundred thirty-seven".