668333311 has 4 divisors (see below), whose sum is σ = 673435224. Its totient is φ = 663231400.

The previous prime is 668333299. The next prime is 668333363. The reversal of 668333311 is 113333866.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 668333311 - 2⁹ = 668332799 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 (668333381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550760 + ... + 2551021.

It is an arithmetic number, because the mean of its divisors is an integer number (168358806).

Almost surely, 2^668333311 is an apocalyptic number.

668333311 is a deficient number, since it is larger than the sum of its proper divisors (5101913).

668333311 is a wasteful number, since it uses less digits than its factorization.

668333311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101912.

The product of its digits is 23328, while the sum is 34.

The square root of 668333311 is about 25852.1432573781. The cubic root of 668333311 is about 874.3078329062.

The spelling of 668333311 in words is "six hundred sixty-eight million, three hundred thirty-three thousand, three hundred eleven".