866313853180686 has 48 divisors (see below), whose sum is σ = 1878162158006784. Its totient is φ = 288594596256912.

The previous prime is 866313853180631. The next prime is 866313853180687. The reversal of 866313853180686 is 686081358313668.

866313853180686 is a `hidden beast` number, since 8 + 6 + 6 + 3 + 1 + 3 + 8 + 531 + 8 + 0 + 6 + 86 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866313853180687) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198938181 + ... + 203246223.

It is an arithmetic number, because the mean of its divisors is an integer number (39128378291808).

Almost surely, 2^{866313853180686} is an apocalyptic number.

866313853180686 is an abundant number, since it is smaller than the sum of its proper divisors (1011848304826098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866313853180686 is a wasteful number, since it uses less digits than its factorization.

866313853180686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4314885 (or 4314882 counting only the distinct ones).

The product of its (nonzero) digits is 716636160, while the sum is 72.

The spelling of 866313853180686 in words is "eight hundred sixty-six trillion, three hundred thirteen billion, eight hundred fifty-three million, one hundred eighty thousand, six hundred eighty-six".