68665056686 has 4 divisors (see below), whose sum is σ = 102997585032. Its totient is φ = 34332528342.

The previous prime is 68665056679. The next prime is 68665056709.

68665056686 is nontrivially palindromic in base 10.

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

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, 17166264170 + ... + 17166264173.

It is an arithmetic number, because the mean of its divisors is an integer number (25749396258).

Almost surely, 2^68665056686 is an apocalyptic number.

68665056686 is a deficient number, since it is larger than the sum of its proper divisors (34332528346).

68665056686 is a wasteful number, since it uses less digits than its factorization.

68665056686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34332528345.

The product of its (nonzero) digits is 74649600, while the sum is 62.

The spelling of 68665056686 in words is "sixty-eight billion, six hundred sixty-five million, fifty-six thousand, six hundred eighty-six".