668297311 has 8 divisors (see below), whose sum is σ = 736568784. Its totient is φ = 601278720.

The previous prime is 668297303. The next prime is 668297321. The reversal of 668297311 is 113792866.

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 668297311 - 2³ = 668297303 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 (668297321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312100 + ... + 314233.

It is an arithmetic number, because the mean of its divisors is an integer number (92071098).

Almost surely, 2^668297311 is an apocalyptic number.

668297311 is a deficient number, since it is larger than the sum of its proper divisors (68271473).

668297311 is a wasteful number, since it uses less digits than its factorization.

668297311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626441.

The product of its digits is 108864, while the sum is 43.

The square root of 668297311 is about 25851.4469807785. The cubic root of 668297311 is about 874.2921343286.

The spelling of 668297311 in words is "six hundred sixty-eight million, two hundred ninety-seven thousand, three hundred eleven".