866320852 has 12 divisors (see below), whose sum is σ = 1581977376. Its totient is φ = 414327320.

The previous prime is 866320817. The next prime is 866320879. The reversal of 866320852 is 258023668.

It is a super-2 number, since 2×866320852² = 1501023637220011808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4708174 + ... + 4708357.

It is an arithmetic number, because the mean of its divisors is an integer number (131831448).

Almost surely, 2^866320852 is an apocalyptic number.

It is an amenable number.

866320852 is a deficient number, since it is larger than the sum of its proper divisors (715656524).

866320852 is a wasteful number, since it uses less digits than its factorization.

866320852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416558 (or 9416556 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 866320852 is about 29433.3289316720. The cubic root of 866320852 is about 953.2926749522.

The spelling of 866320852 in words is "eight hundred sixty-six million, three hundred twenty thousand, eight hundred fifty-two".