68697879686 has 4 divisors (see below), whose sum is σ = 103046819532. Its totient is φ = 34348939842.

The previous prime is 68697879671. The next prime is 68697879709.

68697879686 is nontrivially palindromic in base 10.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68697879686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17174469920 + ... + 17174469923.

It is an arithmetic number, because the mean of its divisors is an integer number (25761704883).

Almost surely, 2^68697879686 is an apocalyptic number.

68697879686 is a deficient number, since it is larger than the sum of its proper divisors (34348939846).

68697879686 is a wasteful number, since it uses less digits than its factorization.

68697879686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34348939845.

The product of its digits is 2633637888, while the sum is 80.

The spelling of 68697879686 in words is "sixty-eight billion, six hundred ninety-seven million, eight hundred seventy-nine thousand, six hundred eighty-six".