68716656713 has 4 divisors (see below), whose sum is σ = 68724804048. Its totient is φ = 68708509380.

The previous prime is 68716656691. The next prime is 68716656733. The reversal of 68716656713 is 31765661786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31765661786 = 2 ⋅15882830893.

It is a cyclic number.

It is not a de Polignac number, because 68716656713 - 2⁶ = 68716656649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68716656733) 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, 4061003 + ... + 4077888.

It is an arithmetic number, because the mean of its divisors is an integer number (17181201012).

Almost surely, 2^68716656713 is an apocalyptic number.

It is an amenable number.

68716656713 is a deficient number, since it is larger than the sum of its proper divisors (8147335).

68716656713 is an equidigital number, since it uses as much as digits as its factorization.

68716656713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8147334.

The product of its digits is 7620480, while the sum is 56.

The spelling of 68716656713 in words is "sixty-eight billion, seven hundred sixteen million, six hundred fifty-six thousand, seven hundred thirteen".