79666716843 has 48 divisors (see below), whose sum is σ = 143208748800. Its totient is φ = 41640661440.

The previous prime is 79666716839. The next prime is 79666716847. The reversal of 79666716843 is 34861766697.

It is an interprime number because it is at equal distance from previous prime (79666716839) and next prime (79666716847).

It is not a de Polignac number, because 79666716843 - 2² = 79666716839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (79666716847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1112793 + ... + 1182218.

It is an arithmetic number, because the mean of its divisors is an integer number (2983515600).

Almost surely, 2^79666716843 is an apocalyptic number.

79666716843 is a deficient number, since it is larger than the sum of its proper divisors (63542031957).

79666716843 is a wasteful number, since it uses less digits than its factorization.

79666716843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295072 (or 2295069 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 79666716843 in words is "seventy-nine billion, six hundred sixty-six million, seven hundred sixteen thousand, eight hundred forty-three".