68668786699 has 4 divisors (see below), whose sum is σ = 69106167664. Its totient is φ = 68231405736.

The previous prime is 68668786687. The next prime is 68668786709. The reversal of 68668786699 is 99668786686.

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 68668786699 - 2²³ = 68660398091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68668786609) 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, 218690247 + ... + 218690560.

It is an arithmetic number, because the mean of its divisors is an integer number (17276541916).

Almost surely, 2^68668786699 is an apocalyptic number.

68668786699 is a deficient number, since it is larger than the sum of its proper divisors (437380965).

68668786699 is a wasteful number, since it uses less digits than its factorization.

68668786699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437380964.

The product of its digits is 2257403904, while the sum is 79.

The spelling of 68668786699 in words is "sixty-eight billion, six hundred sixty-eight million, seven hundred eighty-six thousand, six hundred ninety-nine".