668303866 has 8 divisors (see below), whose sum is σ = 1002936564. Its totient is φ = 333991680.

The previous prime is 668303849. The next prime is 668303957.

668303866 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 661569841 + 6734025 = 25721^2 + 2595^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 74845 + ... + 83296.

Almost surely, 2^668303866 is an apocalyptic number.

668303866 is a deficient number, since it is larger than the sum of its proper divisors (334632698).

668303866 is a wasteful number, since it uses less digits than its factorization.

668303866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160256.

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 668303866 is about 25851.5737625391. The cubic root of 668303866 is about 874.2949928199.

The spelling of 668303866 in words is "six hundred sixty-eight million, three hundred three thousand, eight hundred sixty-six".