668804323 has 16 divisors (see below), whose sum is σ = 757416960. Its totient is φ = 585050400.

The previous prime is 668804291. The next prime is 668804329. The reversal of 668804323 is 323408866.

It is not a de Polignac number, because 668804323 - 2⁵ = 668804291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668804329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55561 + ... + 66517.

It is an arithmetic number, because the mean of its divisors is an integer number (47338560).

Almost surely, 2^668804323 is an apocalyptic number.

668804323 is a deficient number, since it is larger than the sum of its proper divisors (88612637).

668804323 is a wasteful number, since it uses less digits than its factorization.

668804323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11178.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 668804323 is about 25861.2513811687. The cubic root of 668804323 is about 874.5131759441.

The spelling of 668804323 in words is "six hundred sixty-eight million, eight hundred four thousand, three hundred twenty-three".