79638566 has 16 divisors (see below), whose sum is σ = 140928000. Its totient is φ = 33029640.

The previous prime is 79638529. The next prime is 79638569. The reversal of 79638566 is 66583697.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79638569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91316 + ... + 92183.

It is an arithmetic number, because the mean of its divisors is an integer number (8808000).

Almost surely, 2^79638566 is an apocalyptic number.

79638566 is a deficient number, since it is larger than the sum of its proper divisors (61289434).

79638566 is a wasteful number, since it uses less digits than its factorization.

79638566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183539.

The product of its digits is 1632960, while the sum is 50.

The square root of 79638566 is about 8924.0442625527. The cubic root of 79638566 is about 430.2370533550.

The spelling of 79638566 in words is "seventy-nine million, six hundred thirty-eight thousand, five hundred sixty-six".