866786486563208 has 16 divisors (see below), whose sum is σ = 1625331171786000. Its totient is φ = 433364840753616.

The previous prime is 866786486563199. The next prime is 866786486563237. The reversal of 866786486563208 is 802365684687668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550186298 + ... + 3550430441.

It is an arithmetic number, because the mean of its divisors is an integer number (101583198236625).

Almost surely, 2^{866786486563208} is an apocalyptic number.

It is an amenable number.

866786486563208 is a deficient number, since it is larger than the sum of its proper divisors (758544685222792).

866786486563208 is a wasteful number, since it uses less digits than its factorization.

866786486563208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7100632004 (or 7100632000 counting only the distinct ones).

The product of its (nonzero) digits is 26754416640, while the sum is 83.

The spelling of 866786486563208 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, four hundred eighty-six million, five hundred sixty-three thousand, two hundred eight".