79666519680 has 1344 divisors, whose sum is σ = 336411234720. Its totient is φ = 17871114240.

The previous prime is 79666519679. The next prime is 79666519687. The reversal of 79666519680 is 8691566697.

It is not an unprimeable number, because it can be changed into a prime (79666519687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 1852709739 + ... + 1852709781.

Almost surely, 2^79666519680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79666519680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168205617360).

79666519680 is an abundant number, since it is smaller than the sum of its proper divisors (256744715040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79666519680 is a wasteful number, since it uses less digits than its factorization.

79666519680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 79666519680 in words is "seventy-nine billion, six hundred sixty-six million, five hundred nineteen thousand, six hundred eighty".