668804707 has 8 divisors (see below), whose sum is σ = 686386800. Its totient is φ = 651430944.

The previous prime is 668804639. The next prime is 668804713. The reversal of 668804707 is 707408866.

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 668804707 - 2¹⁹ = 668280419 is a prime.

It is a super-2 number, since 2×668804707² = 894599472210711698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668804737) 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 7 ways as a sum of consecutive naturals, for example, 45568 + ... + 58429.

It is an arithmetic number, because the mean of its divisors is an integer number (85798350).

Almost surely, 2^668804707 is an apocalyptic number.

668804707 is a deficient number, since it is larger than the sum of its proper divisors (17582093).

668804707 is a wasteful number, since it uses less digits than its factorization.

668804707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104165.

The product of its (nonzero) digits is 451584, while the sum is 46.

The square root of 668804707 is about 25861.2588054023. The cubic root of 668804707 is about 874.5133433139.

The spelling of 668804707 in words is "six hundred sixty-eight million, eight hundred four thousand, seven hundred seven".