79399661 has 8 divisors (see below), whose sum is σ = 87715200. Its totient is φ = 71267040.

The previous prime is 79399631. The next prime is 79399667. The reversal of 79399661 is 16699397.

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 79399661 - 2⁶ = 79399597 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 (79399667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44816 + ... + 46553.

It is an arithmetic number, because the mean of its divisors is an integer number (10964400).

Almost surely, 2^79399661 is an apocalyptic number.

It is an amenable number.

79399661 is a deficient number, since it is larger than the sum of its proper divisors (8315539).

79399661 is a wasteful number, since it uses less digits than its factorization.

79399661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91459.

The product of its digits is 551124, while the sum is 50.

The square root of 79399661 is about 8910.6487418145. The cubic root of 79399661 is about 429.8064046496.

The spelling of 79399661 in words is "seventy-nine million, three hundred ninety-nine thousand, six hundred sixty-one".