79566666597 has 72 divisors (see below), whose sum is σ = 127366162560. Its totient is φ = 47827718400.

The previous prime is 79566666593. The next prime is 79566666631.

It is a happy number.

79566666597 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 79566666597 - 2² = 79566666593 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79566666593) 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 71 ways as a sum of consecutive naturals, for example, 90313597 + ... + 90314477.

It is an arithmetic number, because the mean of its divisors is an integer number (1768974480).

Almost surely, 2^79566666597 is an apocalyptic number.

It is an amenable number.

79566666597 is a deficient number, since it is larger than the sum of its proper divisors (47799495963).

79566666597 is a wasteful number, since it uses less digits than its factorization.

79566666597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1481 counting only the distinct ones).

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

The spelling of 79566666597 in words is "seventy-nine billion, five hundred sixty-six million, six hundred sixty-six thousand, five hundred ninety-seven".