866786276338868 has 24 divisors (see below), whose sum is σ = 1531209545857152. Its totient is φ = 429298666153664.

The previous prime is 866786276338747. The next prime is 866786276338901. The reversal of 866786276338868 is 868833672687668.

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, 99761105 + ... + 108101112.

It is an arithmetic number, because the mean of its divisors is an integer number (63800397744048).

Almost surely, 2^{866786276338868} is an apocalyptic number.

It is an amenable number.

866786276338868 is a deficient number, since it is larger than the sum of its proper divisors (664423269518284).

866786276338868 is a wasteful number, since it uses less digits than its factorization.

866786276338868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207872071 (or 207872069 counting only the distinct ones).

The product of its digits is 224737099776, while the sum is 92.

The spelling of 866786276338868 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-six million, three hundred thirty-eight thousand, eight hundred sixty-eight".