566552021 has 4 divisors (see below), whose sum is σ = 647488032. Its totient is φ = 485616012.

The previous prime is 566552011. The next prime is 566552023. The reversal of 566552021 is 120255665.

566552021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-566552021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566552023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40467995 + ... + 40468008.

It is an arithmetic number, because the mean of its divisors is an integer number (161872008).

Almost surely, 2^566552021 is an apocalyptic number.

It is an amenable number.

566552021 is a deficient number, since it is larger than the sum of its proper divisors (80936011).

566552021 is an equidigital number, since it uses as much as digits as its factorization.

566552021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80936010.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 566552021 is about 23802.3532660113. The cubic root of 566552021 is about 827.4592166293.

The spelling of 566552021 in words is "five hundred sixty-six million, five hundred fifty-two thousand, twenty-one".