79817966 has 16 divisors (see below), whose sum is σ = 121651200. Its totient is φ = 39271128.

The previous prime is 79817957. The next prime is 79817999. The reversal of 79817966 is 66971897.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59855 + ... + 61173.

It is an arithmetic number, because the mean of its divisors is an integer number (7603200).

Almost surely, 2^79817966 is an apocalyptic number.

79817966 is a deficient number, since it is larger than the sum of its proper divisors (41833234).

79817966 is a wasteful number, since it uses less digits than its factorization.

79817966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783.

The product of its digits is 1143072, while the sum is 53.

The square root of 79817966 is about 8934.0901047616. The cubic root of 79817966 is about 430.5598728397.

The spelling of 79817966 in words is "seventy-nine million, eight hundred seventeen thousand, nine hundred sixty-six".