866786517540118 has 16 divisors (see below), whose sum is σ = 1485934915188384. Its totient is φ = 371476143380160.

The previous prime is 866786517540091. The next prime is 866786517540133. The reversal of 866786517540118 is 811045715687668.

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, 314638605 + ... + 317381512.

It is an arithmetic number, because the mean of its divisors is an integer number (92870932199274).

Almost surely, 2^{866786517540118} is an apocalyptic number.

866786517540118 is a deficient number, since it is larger than the sum of its proper divisors (619148397648266).

866786517540118 is a wasteful number, since it uses less digits than its factorization.

866786517540118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632118087.

The product of its (nonzero) digits is 541900800, while the sum is 73.

The spelling of 866786517540118 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred seventeen million, five hundred forty thousand, one hundred eighteen".