668683706 has 8 divisors (see below), whose sum is σ = 1003308384. Its totient is φ = 334247580.

The previous prime is 668683703. The next prime is 668683709. The reversal of 668683706 is 607386866.

It is an interprime number because it is at equal distance from previous prime (668683703) and next prime (668683709).

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (668683703) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 37910 + ... + 52673.

It is an arithmetic number, because the mean of its divisors is an integer number (125413548).

Almost surely, 2^668683706 is an apocalyptic number.

668683706 is a deficient number, since it is larger than the sum of its proper divisors (334624678).

668683706 is a wasteful number, since it uses less digits than its factorization.

668683706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94276.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 668683706 is about 25858.9192736278. The cubic root of 668683706 is about 874.4606007768.

The spelling of 668683706 in words is "six hundred sixty-eight million, six hundred eighty-three thousand, seven hundred six".