866323668 has 96 divisors (see below), whose sum is σ = 2385331200. Its totient is φ = 239602176.

The previous prime is 866323657. The next prime is 866323691.

866323668 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330748 + ... + 333356.

It is an arithmetic number, because the mean of its divisors is an integer number (24847200).

Almost surely, 2^866323668 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 866323668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1192665600).

866323668 is an abundant number, since it is smaller than the sum of its proper divisors (1519007532).

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

866323668 is a wasteful number, since it uses less digits than its factorization.

866323668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749 (or 2747 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The square root of 866323668 is about 29433.3767685599. The cubic root of 866323668 is about 953.2937078525.

The spelling of 866323668 in words is "eight hundred sixty-six million, three hundred twenty-three thousand, six hundred sixty-eight".