866570672144 has 20 divisors (see below), whose sum is σ = 1681520759340. Its totient is φ = 432629831040.

The previous prime is 866570672141. The next prime is 866570672167. The reversal of 866570672144 is 441276075668.

It can be written as a sum of positive squares in 2 ways, for example, as 810921862144 + 55648810000 = 900512^2 + 235900^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 866570672144.

It is not an unprimeable number, because it can be changed into a prime (866570672141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40958159 + ... + 40979310.

It is an arithmetic number, because the mean of its divisors is an integer number (84076037967).

Almost surely, 2^866570672144 is an apocalyptic number.

It is an amenable number.

866570672144 is a deficient number, since it is larger than the sum of its proper divisors (814950087196).

866570672144 is a wasteful number, since it uses less digits than its factorization.

866570672144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81938138 (or 81938132 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 866570672144 in words is "eight hundred sixty-six billion, five hundred seventy million, six hundred seventy-two thousand, one hundred forty-four".