566865216 has 140 divisors (see below), whose sum is σ = 1720120512. Its totient is φ = 184488192.

The previous prime is 566865191. The next prime is 566865217. The reversal of 566865216 is 612568665.

It is a happy number.

566865216 is a `hidden beast` number, since 566 + 8 + 65 + 21 + 6 = 666.

It is a super-2 number, since 2×566865216² = 642672346221453312, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566865217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 221641 + ... + 224183.

Almost surely, 2^566865216 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 566865216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860060256).

566865216 is an abundant number, since it is smaller than the sum of its proper divisors (1153255296).

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

566865216 is a wasteful number, since it uses less digits than its factorization.

566865216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2610 (or 2591 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 566865216 is about 23808.9314333928. The cubic root of 566865216 is about 827.6116641479.

The spelling of 566865216 in words is "five hundred sixty-six million, eight hundred sixty-five thousand, two hundred sixteen".