68615866879 has 8 divisors (see below), whose sum is σ = 78471893120. Its totient is φ = 58773280536.

The previous prime is 68615866877. The next prime is 68615866901. The reversal of 68615866879 is 97866851686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68615866879 - 2¹ = 68615866877 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 (68615866873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3349029 + ... + 3369454.

It is an arithmetic number, because the mean of its divisors is an integer number (9808986640).

Almost surely, 2^68615866879 is an apocalyptic number.

68615866879 is a deficient number, since it is larger than the sum of its proper divisors (9856026241).

68615866879 is a wasteful number, since it uses less digits than its factorization.

68615866879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719949.

The product of its digits is 209018880, while the sum is 70.

The spelling of 68615866879 in words is "sixty-eight billion, six hundred fifteen million, eight hundred sixty-six thousand, eight hundred seventy-nine".