8665340642879 has 4 divisors (see below), whose sum is σ = 8667503197584. Its totient is φ = 8663178088176.

The previous prime is 8665340642863. The next prime is 8665340642887. The reversal of 8665340642879 is 9782460435668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8665340642879 - 2⁴ = 8665340642863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8665340642279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081271342 + ... + 1081279355.

It is an arithmetic number, because the mean of its divisors is an integer number (2166875799396).

Almost surely, 2^{8665340642879} is an apocalyptic number.

8665340642879 is a deficient number, since it is larger than the sum of its proper divisors (2162554705).

8665340642879 is a wasteful number, since it uses less digits than its factorization.

8665340642879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162554704.

The product of its (nonzero) digits is 418037760, while the sum is 68.

The spelling of 8665340642879 in words is "eight trillion, six hundred sixty-five billion, three hundred forty million, six hundred forty-two thousand, eight hundred seventy-nine".