79791666 has 8 divisors (see below), whose sum is σ = 159583344. Its totient is φ = 26597220.

The previous prime is 79791641. The next prime is 79791667. The reversal of 79791666 is 66619797.

It is a sphenic number, since it is the product of 3 distinct primes.

79791666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (79791667) 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, 6649300 + ... + 6649311.

It is an arithmetic number, because the mean of its divisors is an integer number (19947918).

Almost surely, 2^79791666 is an apocalyptic number.

79791666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

79791666 is a wasteful number, since it uses less digits than its factorization.

79791666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13298616.

The product of its digits is 857304, while the sum is 51.

The square root of 79791666 is about 8932.6180932580. The cubic root of 79791666 is about 430.5125778544.

The spelling of 79791666 in words is "seventy-nine million, seven hundred ninety-one thousand, six hundred sixty-six".