866511756583066 has 16 divisors (see below), whose sum is σ = 1417941573462720. Its totient is φ = 393865301234880.

The previous prime is 866511756582919. The next prime is 866511756583069. The reversal of 866511756583066 is 660385657115668.

It is a self number, because there is not a number n which added to its sum of digits gives 866511756583066.

It is not an unprimeable number, because it can be changed into a prime (866511756583069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181542006 + ... + 186253921.

It is an arithmetic number, because the mean of its divisors is an integer number (88621348341420).

Almost surely, 2^{866511756583066} is an apocalyptic number.

866511756583066 is a deficient number, since it is larger than the sum of its proper divisors (551429816879654).

866511756583066 is a wasteful number, since it uses less digits than its factorization.

866511756583066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367903029.

The product of its (nonzero) digits is 1306368000, while the sum is 73.

The spelling of 866511756583066 in words is "eight hundred sixty-six trillion, five hundred eleven billion, seven hundred fifty-six million, five hundred eighty-three thousand, sixty-six".