566819563 has 4 divisors (see below), whose sum is σ = 566895520. Its totient is φ = 566743608.

The previous prime is 566819489. The next prime is 566819569. The reversal of 566819563 is 365918665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566819563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566819569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25395 + ... + 42172.

It is an arithmetic number, because the mean of its divisors is an integer number (141723880).

Almost surely, 2^566819563 is an apocalyptic number.

566819563 is a deficient number, since it is larger than the sum of its proper divisors (75957).

566819563 is an equidigital number, since it uses as much as digits as its factorization.

566819563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75956.

The product of its digits is 1166400, while the sum is 49.

The square root of 566819563 is about 23807.9726772357. The cubic root of 566819563 is about 827.5894460682.

The spelling of 566819563 in words is "five hundred sixty-six million, eight hundred nineteen thousand, five hundred sixty-three".