866788517342285 has 8 divisors (see below), whose sum is σ = 1040172526559256. Its totient is φ = 693413276708160.

The previous prime is 866788517342269. The next prime is 866788517342309. The reversal of 866788517342285 is 582243715887668.

It can be written as a sum of positive squares in 4 ways, for example, as 36947688128521 + 829840829213764 = 6078461^2 + 28806958^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866788517342285 - 2⁴ = 866788517342269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2191928234 + ... + 2192323643.

It is an arithmetic number, because the mean of its divisors is an integer number (130021565819907).

Almost surely, 2^{866788517342285} is an apocalyptic number.

It is an amenable number.

866788517342285 is a deficient number, since it is larger than the sum of its proper divisors (173384009216971).

866788517342285 is a wasteful number, since it uses less digits than its factorization.

866788517342285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4384291423.

The product of its digits is 8670412800, while the sum is 80.

The spelling of 866788517342285 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred seventeen million, three hundred forty-two thousand, two hundred eighty-five".