866803968 has 108 divisors (see below), whose sum is σ = 2585588460. Its totient is φ = 278949888.

The previous prime is 866803913. The next prime is 866804011. The reversal of 866803968 is 869308668.

It can be written as a sum of positive squares in 2 ways, for example, as 154554624 + 712249344 = 12432^2 + 26688^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60330 + ... + 73302.

Almost surely, 2^866803968 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 866803968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1292794230).

866803968 is an abundant number, since it is smaller than the sum of its proper divisors (1718784492).

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

866803968 is a wasteful number, since it uses less digits than its factorization.

866803968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13024 (or 13007 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 866803968 is about 29441.5347426047. The cubic root of 866803968 is about 953.4698477085.

The spelling of 866803968 in words is "eight hundred sixty-six million, eight hundred three thousand, nine hundred sixty-eight".