68685658687 has 8 divisors (see below), whose sum is σ = 68935271120. Its totient is φ = 68436239040.

The previous prime is 68685658607. The next prime is 68685658703. The reversal of 68685658687 is 78685658686.

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 68685658687 - 2³⁵ = 34325920319 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 (68685658607) 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, 685864 + ... + 779602.

It is an arithmetic number, because the mean of its divisors is an integer number (8616908890).

Almost surely, 2^68685658687 is an apocalyptic number.

68685658687 is a deficient number, since it is larger than the sum of its proper divisors (249612433).

68685658687 is a wasteful number, since it uses less digits than its factorization.

68685658687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96393.

The product of its digits is 928972800, while the sum is 73.

Subtracting 68685658687 from its reverse (78685658686), we obtain a palindrome (9999999999).

The spelling of 68685658687 in words is "sixty-eight billion, six hundred eighty-five million, six hundred fifty-eight thousand, six hundred eighty-seven".