566506009 has 4 divisors (see below), whose sum is σ = 566572900. Its totient is φ = 566439120.

The previous prime is 566506007. The next prime is 566506013. The reversal of 566506009 is 900605665.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 256640400 + 309865609 = 16020^2 + 17603^2 .

It is a cyclic number.

It is not a de Polignac number, because 566506009 - 2¹ = 566506007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566506007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18522 + ... + 38419.

It is an arithmetic number, because the mean of its divisors is an integer number (141643225).

Almost surely, 2^566506009 is an apocalyptic number.

It is an amenable number.

566506009 is a deficient number, since it is larger than the sum of its proper divisors (66891).

566506009 is an equidigital number, since it uses as much as digits as its factorization.

566506009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66890.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 566506009 is about 23801.3867032995. The cubic root of 566506009 is about 827.4368155770.

The spelling of 566506009 in words is "five hundred sixty-six million, five hundred six thousand, nine".