79516566 has 40 divisors (see below), whose sum is σ = 185931504. Its totient is φ = 25351920.

The previous prime is 79516561. The next prime is 79516627. The reversal of 79516566 is 66561597.

79516566 is a `hidden beast` number, since 79 + 5 + 16 + 566 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79516561) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6945 + ... + 14396.

Almost surely, 2^79516566 is an apocalyptic number.

79516566 is an abundant number, since it is smaller than the sum of its proper divisors (106414938).

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

79516566 is a wasteful number, since it uses less digits than its factorization.

79516566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21378 (or 21369 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 79516566 is about 8917.2061768247. The cubic root of 79516566 is about 430.0172446663.

The spelling of 79516566 in words is "seventy-nine million, five hundred sixteen thousand, five hundred sixty-six".