566161565 has 4 divisors (see below), whose sum is σ = 679393884. Its totient is φ = 452929248.

The previous prime is 566161553. The next prime is 566161619. The reversal of 566161565 is 565161665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565161665 = 5 ⋅113032333.

It can be written as a sum of positive squares in 2 ways, for example, as 357474649 + 208686916 = 18907^2 + 14446^2 .

It is a cyclic number.

It is not a de Polignac number, because 566161565 - 2¹⁰ = 566160541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 56616152 + ... + 56616161.

It is an arithmetic number, because the mean of its divisors is an integer number (169848471).

Almost surely, 2^566161565 is an apocalyptic number.

It is an amenable number.

566161565 is a deficient number, since it is larger than the sum of its proper divisors (113232319).

566161565 is a wasteful number, since it uses less digits than its factorization.

566161565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113232318.

The product of its digits is 162000, while the sum is 41.

The square root of 566161565 is about 23794.1498062024. The cubic root of 566161565 is about 827.2690836530.

Subtracting from 566161565 its product of digits (162000), we obtain a palindrome (565999565).

The spelling of 566161565 in words is "five hundred sixty-six million, one hundred sixty-one thousand, five hundred sixty-five".