79340665 has 16 divisors (see below), whose sum is σ = 99524880. Its totient is φ = 60641280.

The previous prime is 79340659. The next prime is 79340671. The reversal of 79340665 is 56604397.

It is an interprime number because it is at equal distance from previous prime (79340659) and next prime (79340671).

It can be written as a sum of positive squares in 8 ways, for example, as 5053504 + 74287161 = 2248^2 + 8619^2 .

It is not a de Polignac number, because 79340665 - 2⁷ = 79340537 is a prime.

It is a super-2 number, since 2×79340665² = 12589882245284450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11245 + ... + 16885.

It is an arithmetic number, because the mean of its divisors is an integer number (6220305).

Almost surely, 2^79340665 is an apocalyptic number.

It is an amenable number.

79340665 is a deficient number, since it is larger than the sum of its proper divisors (20184215).

79340665 is a wasteful number, since it uses less digits than its factorization.

79340665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 79340665 is about 8907.3377055100. The cubic root of 79340665 is about 429.6999258511.

The spelling of 79340665 in words is "seventy-nine million, three hundred forty thousand, six hundred sixty-five".