866941986 has 16 divisors (see below), whose sum is σ = 1734493824. Its totient is φ = 288879024.

The previous prime is 866941981. The next prime is 866941987. The reversal of 866941986 is 689149668.

866941986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (866941981) 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, 5761 + ... + 42036.

It is an arithmetic number, because the mean of its divisors is an integer number (108405864).

Almost surely, 2^866941986 is an apocalyptic number.

866941986 is an abundant number, since it is smaller than the sum of its proper divisors (867551838).

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

866941986 is a wasteful number, since it uses less digits than its factorization.

866941986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50825.

The product of its digits is 4478976, while the sum is 57.

The square root of 866941986 is about 29443.8785828226. The cubic root of 866941986 is about 953.5204508523.

The spelling of 866941986 in words is "eight hundred sixty-six million, nine hundred forty-one thousand, nine hundred eighty-six".