79665599 has 8 divisors (see below), whose sum is σ = 86114112. Its totient is φ = 73262880.

The previous prime is 79665569. The next prime is 79665601. The reversal of 79665599 is 99556697.

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

It is a cyclic number.

It is not a de Polignac number, because 79665599 - 2⁸ = 79665343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79665529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7784 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (10764264).

Almost surely, 2^79665599 is an apocalyptic number.

79665599 is a deficient number, since it is larger than the sum of its proper divisors (6448513).

79665599 is a wasteful number, since it uses less digits than its factorization.

79665599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22897.

The product of its digits is 4592700, while the sum is 56.

The square root of 79665599 is about 8925.5587500167. The cubic root of 79665599 is about 430.2857286100.

The spelling of 79665599 in words is "seventy-nine million, six hundred sixty-five thousand, five hundred ninety-nine".