79849665 has 48 divisors (see below), whose sum is σ = 165144960. Its totient is φ = 36499680.

The previous prime is 79849657. The next prime is 79849681. The reversal of 79849665 is 56694897.

79849665 is a `hidden beast` number, since 7 + 98 + 496 + 65 = 666.

It is not a de Polignac number, because 79849665 - 2³ = 79849657 is a prime.

It is a super-2 number, since 2×79849665² = 12751938001224450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 580 + ... + 12650.

It is an arithmetic number, because the mean of its divisors is an integer number (3440520).

Almost surely, 2^79849665 is an apocalyptic number.

It is an amenable number.

79849665 is an abundant number, since it is smaller than the sum of its proper divisors (85295295).

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

79849665 is a wasteful number, since it uses less digits than its factorization.

79849665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12099 (or 12086 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 79849665 is about 8935.8639761357. The cubic root of 79849665 is about 430.6168629792.

The spelling of 79849665 in words is "seventy-nine million, eight hundred forty-nine thousand, six hundred sixty-five".