79665656697 has 24 divisors (see below), whose sum is σ = 126571250208. Its totient is φ = 48282208920.

The previous prime is 79665656657. The next prime is 79665656737.

It is a happy number.

79665656697 is a `hidden beast` number, since 7 + 9 + 6 + 6 + 56 + 566 + 9 + 7 = 666.

79665656697 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (79665656657) and next prime (79665656737).

It is not a de Polignac number, because 79665656697 - 2¹⁸ = 79665394553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79665656657) 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 23 ways as a sum of consecutive naturals, for example, 3313243 + ... + 3337200.

It is an arithmetic number, because the mean of its divisors is an integer number (5273802092).

Almost surely, 2^79665656697 is an apocalyptic number.

It is an amenable number.

79665656697 is a deficient number, since it is larger than the sum of its proper divisors (46905593511).

79665656697 is a wasteful number, since it uses less digits than its factorization.

79665656697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6650482 (or 6650457 counting only the distinct ones).

The product of its digits is 771573600, while the sum is 72.

The spelling of 79665656697 in words is "seventy-nine billion, six hundred sixty-five million, six hundred fifty-six thousand, six hundred ninety-seven".