668067317 has 8 divisors (see below), whose sum is σ = 671580000. Its totient is φ = 664564464.

The previous prime is 668067299. The next prime is 668067319. The reversal of 668067317 is 713760866.

It is a happy number.

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 668067317 - 2⁸ = 668067061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668067319) 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 7 ways as a sum of consecutive naturals, for example, 160934 + ... + 165032.

It is an arithmetic number, because the mean of its divisors is an integer number (83947500).

Almost surely, 2^668067317 is an apocalyptic number.

It is an amenable number.

668067317 is a deficient number, since it is larger than the sum of its proper divisors (3512683).

668067317 is a wasteful number, since it uses less digits than its factorization.

668067317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 668067317 is about 25846.9982202963. The cubic root of 668067317 is about 874.1918271681.

The spelling of 668067317 in words is "six hundred sixty-eight million, sixty-seven thousand, three hundred seventeen".