668499670 has 32 divisors (see below), whose sum is σ = 1305170496. Its totient is φ = 245529600.

The previous prime is 668499647. The next prime is 668499691. The reversal of 668499670 is 76994866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40986 + ... + 54925.

It is an arithmetic number, because the mean of its divisors is an integer number (40786578).

Almost surely, 2^668499670 is an apocalyptic number.

668499670 is a deficient number, since it is larger than the sum of its proper divisors (636670826).

668499670 is a wasteful number, since it uses less digits than its factorization.

668499670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95976.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The square root of 668499670 is about 25855.3605660412. The cubic root of 668499670 is about 874.3803700210.

The spelling of 668499670 in words is "six hundred sixty-eight million, four hundred ninety-nine thousand, six hundred seventy".