79890566 has 8 divisors (see below), whose sum is σ = 136955280. Its totient is φ = 34238808.

The previous prime is 79890533. The next prime is 79890593. The reversal of 79890566 is 66509897.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2853221 + ... + 2853248.

It is an arithmetic number, because the mean of its divisors is an integer number (17119410).

Almost surely, 2^79890566 is an apocalyptic number.

79890566 is a deficient number, since it is larger than the sum of its proper divisors (57064714).

79890566 is a wasteful number, since it uses less digits than its factorization.

79890566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5706478.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 79890566 is about 8938.1522699046. The cubic root of 79890566 is about 430.6903746796.

The spelling of 79890566 in words is "seventy-nine million, eight hundred ninety thousand, five hundred sixty-six".