668315206 has 8 divisors (see below), whose sum is σ = 1079586144. Its totient is φ = 308453160.

The previous prime is 668315183. The next prime is 668315251. The reversal of 668315206 is 602513866.

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

It is a congruent number.

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, 12852190 + ... + 12852241.

It is an arithmetic number, because the mean of its divisors is an integer number (134948268).

Almost surely, 2^668315206 is an apocalyptic number.

668315206 is a deficient number, since it is larger than the sum of its proper divisors (411270938).

668315206 is a wasteful number, since it uses less digits than its factorization.

668315206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25704446.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 668315206 is about 25851.7930906156. The cubic root of 668315206 is about 874.2999379003.

The spelling of 668315206 in words is "six hundred sixty-eight million, three hundred fifteen thousand, two hundred six".