79704066420 has 720 divisors, whose sum is σ = 290915634240. Its totient is φ = 18100454400.

The previous prime is 79704066317. The next prime is 79704066437. The reversal of 79704066420 is 2466040797.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1350916351 + ... + 1350916409.

It is an arithmetic number, because the mean of its divisors is an integer number (404049492).

Almost surely, 2^79704066420 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 79704066420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145457817120).

79704066420 is an abundant number, since it is smaller than the sum of its proper divisors (211211567820).

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

79704066420 is a wasteful number, since it uses less digits than its factorization.

79704066420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 79704066420 in words is "seventy-nine billion, seven hundred four million, sixty-six thousand, four hundred twenty".