866786517364087 has 8 divisors (see below), whose sum is σ = 868931948297600. Its totient is φ = 864641213985024.

The previous prime is 866786517364063. The next prime is 866786517364213. The reversal of 866786517364087 is 780463715687668.

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

It is a cyclic number.

It is not a de Polignac number, because 866786517364087 - 2²³ = 866786508975479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866786517364087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786517364007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18273762 + ... + 45469807.

It is an arithmetic number, because the mean of its divisors is an integer number (108616493537200).

Almost surely, 2^{866786517364087} is an apocalyptic number.

866786517364087 is a deficient number, since it is larger than the sum of its proper divisors (2145430933513).

866786517364087 is a wasteful number, since it uses less digits than its factorization.

866786517364087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63777225.

The product of its (nonzero) digits is 13655900160, while the sum is 82.

The spelling of 866786517364087 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, three hundred sixty-four thousand, eighty-seven".