86665767893 has 4 divisors (see below), whose sum is σ = 86690136300. Its totient is φ = 86641399488.

The previous prime is 86665767883. The next prime is 86665767907. The reversal of 86665767893 is 39876756668.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43294373329 + 43371394564 = 208073^2 + 208258^2 .

It is a cyclic number.

It is not a de Polignac number, because 86665767893 - 2⁸ = 86665767637 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 (86665767833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12178868 + ... + 12185981.

It is an arithmetic number, because the mean of its divisors is an integer number (21672534075).

Almost surely, 2^86665767893 is an apocalyptic number.

It is an amenable number.

86665767893 is a deficient number, since it is larger than the sum of its proper divisors (24368407).

86665767893 is a wasteful number, since it uses less digits than its factorization.

86665767893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24368406.

The product of its digits is 548674560, while the sum is 71.

The spelling of 86665767893 in words is "eighty-six billion, six hundred sixty-five million, seven hundred sixty-seven thousand, eight hundred ninety-three".