866818574086 has 16 divisors (see below), whose sum is σ = 1320288914736. Its totient is φ = 426728687616.

The previous prime is 866818574077. The next prime is 866818574087. The reversal of 866818574086 is 680475818668.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866818574087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1333291 + ... + 1873846.

It is an arithmetic number, because the mean of its divisors is an integer number (82518057171).

Almost surely, 2^866818574086 is an apocalyptic number.

866818574086 is a deficient number, since it is larger than the sum of its proper divisors (453470340650).

866818574086 is a wasteful number, since it uses less digits than its factorization.

866818574086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209223.

The product of its (nonzero) digits is 123863040, while the sum is 67.

The spelling of 866818574086 in words is "eight hundred sixty-six billion, eight hundred eighteen million, five hundred seventy-four thousand, eighty-six".