566564623 has 4 divisors (see below), whose sum is σ = 568044288. Its totient is φ = 565084960.

The previous prime is 566564573. The next prime is 566564639. The reversal of 566564623 is 326465665.

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

It is a cyclic number.

It is not a de Polignac number, because 566564623 - 2¹⁷ = 566433551 is a prime.

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 566564623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566564693) 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, 739258 + ... + 740023.

It is an arithmetic number, because the mean of its divisors is an integer number (142011072).

Almost surely, 2^566564623 is an apocalyptic number.

566564623 is a deficient number, since it is larger than the sum of its proper divisors (1479665).

566564623 is a wasteful number, since it uses less digits than its factorization.

566564623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479664.

The product of its digits is 777600, while the sum is 43.

The square root of 566564623 is about 23802.6179862636. The cubic root of 566564623 is about 827.4653517315.

The spelling of 566564623 in words is "five hundred sixty-six million, five hundred sixty-four thousand, six hundred twenty-three".