866580936 has 128 divisors (see below), whose sum is σ = 2450891520. Its totient is φ = 253338624.

The previous prime is 866580931. The next prime is 866580973. The reversal of 866580936 is 639085668.

It is not an unprimeable number, because it can be changed into a prime (866580931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1413366 + ... + 1413978.

It is an arithmetic number, because the mean of its divisors is an integer number (19147590).

Almost surely, 2^866580936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866580936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225445760).

866580936 is an abundant number, since it is smaller than the sum of its proper divisors (1584310584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866580936 is a wasteful number, since it uses less digits than its factorization.

866580936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 866580936 is about 29437.7467887744. The cubic root of 866580936 is about 953.3880635387.

The spelling of 866580936 in words is "eight hundred sixty-six million, five hundred eighty thousand, nine hundred thirty-six".