566661061 has 4 divisors (see below), whose sum is σ = 567470124. Its totient is φ = 565852000.

The previous prime is 566661049. The next prime is 566661083. The reversal of 566661061 is 160166665.

566661061 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 an emirpimes, since its reverse is a distinct semiprime: 160166665 = 5 ⋅32033333.

It can be written as a sum of positive squares in 2 ways, for example, as 436016161 + 130644900 = 20881^2 + 11430^2 .

It is a cyclic number.

It is not a de Polignac number, because 566661061 - 2⁷ = 566660933 is a prime.

It is a super-2 number, since 2×566661061² = 642209516107291442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 566661061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566661091) 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, 403480 + ... + 404881.

It is an arithmetic number, because the mean of its divisors is an integer number (141867531).

Almost surely, 2^566661061 is an apocalyptic number.

It is an amenable number.

566661061 is a deficient number, since it is larger than the sum of its proper divisors (809063).

566661061 is an equidigital number, since it uses as much as digits as its factorization.

566661061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809062.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 566661061 is about 23804.6436856341. The cubic root of 566661061 is about 827.5122981716.

The spelling of 566661061 in words is "five hundred sixty-six million, six hundred sixty-one thousand, sixty-one".