866818574085 has 64 divisors (see below), whose sum is σ = 1465570379520. Its totient is φ = 437486531328.

The previous prime is 866818574077. The next prime is 866818574087. The reversal of 866818574085 is 580475818668.

It is not a de Polignac number, because 866818574085 - 2³ = 866818574077 is a prime.

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 63 ways as a sum of consecutive naturals, for example, 104218347 + ... + 104226663.

It is an arithmetic number, because the mean of its divisors is an integer number (22899537180).

Almost surely, 2^866818574085 is an apocalyptic number.

It is an amenable number.

866818574085 is a deficient number, since it is larger than the sum of its proper divisors (598751805435).

866818574085 is a wasteful number, since it uses less digits than its factorization.

866818574085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395 (or 9357 counting only the distinct ones).

The product of its (nonzero) digits is 103219200, while the sum is 66.

The spelling of 866818574085 in words is "eight hundred sixty-six billion, eight hundred eighteen million, five hundred seventy-four thousand, eighty-five".