79665618 has 16 divisors (see below), whose sum is σ = 160142400. Its totient is φ = 26420016.

The previous prime is 79665601. The next prime is 79665623. The reversal of 79665618 is 81656697.

It is a super-2 number, since 2×79665618² = 12693221382643848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32518 + ... + 34881.

It is an arithmetic number, because the mean of its divisors is an integer number (10008900).

Almost surely, 2^79665618 is an apocalyptic number.

79665618 is an abundant number, since it is smaller than the sum of its proper divisors (80476782).

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

79665618 is a wasteful number, since it uses less digits than its factorization.

79665618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67601.

The product of its digits is 544320, while the sum is 48.

The square root of 79665618 is about 8925.5598143758. The cubic root of 79665618 is about 430.2857628173.

The spelling of 79665618 in words is "seventy-nine million, six hundred sixty-five thousand, six hundred eighteen".