566430021 has 24 divisors (see below), whose sum is σ = 868307544. Its totient is φ = 354585600.

The previous prime is 566429999. The next prime is 566430037. The reversal of 566430021 is 120034665.

It can be written as a sum of positive squares in 4 ways, for example, as 461777121 + 104652900 = 21489^2 + 10230^2 .

It is not a de Polignac number, because 566430021 - 2⁷ = 566429893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566430061) 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 23 ways as a sum of consecutive naturals, for example, 65871 + ... + 73971.

It is an arithmetic number, because the mean of its divisors is an integer number (36179481).

Almost surely, 2^566430021 is an apocalyptic number.

566430021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

566430021 is a deficient number, since it is larger than the sum of its proper divisors (301877523).

566430021 is a wasteful number, since it uses less digits than its factorization.

566430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8581 (or 8578 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 566430021 is about 23799.7903562195. The cubic root of 566430021 is about 827.3998179817.

Adding to 566430021 its reverse (120034665), we get a palindrome (686464686).

The spelling of 566430021 in words is "five hundred sixty-six million, four hundred thirty thousand, twenty-one".