668713015 has 8 divisors (see below), whose sum is σ = 808229520. Its totient is φ = 531121152.

The previous prime is 668712983. The next prime is 668713051. The reversal of 668713015 is 510317866.

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 668713015 - 2⁵ = 668712983 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 480394 + ... + 481783.

It is an arithmetic number, because the mean of its divisors is an integer number (101028690).

Almost surely, 2^668713015 is an apocalyptic number.

668713015 is a deficient number, since it is larger than the sum of its proper divisors (139516505).

668713015 is a wasteful number, since it uses less digits than its factorization.

668713015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962321.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 668713015 is about 25859.4859771033. The cubic root of 668713015 is about 874.4733767181.

The spelling of 668713015 in words is "six hundred sixty-eight million, seven hundred thirteen thousand, fifteen".