79747066404 has 72 divisors (see below), whose sum is σ = 209142693760. Its totient is φ = 26570428704.

The previous prime is 79747066381. The next prime is 79747066409. The reversal of 79747066404 is 40466074797.

79747066404 is a `hidden beast` number, since 79 + 7 + 470 + 66 + 40 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (79747066409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2299062 + ... + 2333490.

Almost surely, 2^79747066404 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 79747066404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104571346880).

79747066404 is an abundant number, since it is smaller than the sum of its proper divisors (129395627356).

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

79747066404 is a wasteful number, since it uses less digits than its factorization.

79747066404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36831 (or 36817 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 54.

The spelling of 79747066404 in words is "seventy-nine billion, seven hundred forty-seven million, sixty-six thousand, four hundred four".