668307936911 has 4 divisors (see below), whose sum is σ = 707620168512. Its totient is φ = 628995705312.

The previous prime is 668307936893. The next prime is 668307936913. The reversal of 668307936911 is 119639703866.

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 668307936911 - 2¹⁰ = 668307935887 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 (668307936913) 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, 19656115775 + ... + 19656115808.

It is an arithmetic number, because the mean of its divisors is an integer number (176905042128).

Almost surely, 2^668307936911 is an apocalyptic number.

668307936911 is a deficient number, since it is larger than the sum of its proper divisors (39312231601).

668307936911 is a wasteful number, since it uses less digits than its factorization.

668307936911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39312231600.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 668307936911 in words is "six hundred sixty-eight billion, three hundred seven million, nine hundred thirty-six thousand, nine hundred eleven".