566105263661 has 4 divisors (see below), whose sum is σ = 646977444192. Its totient is φ = 485233083132.

The previous prime is 566105263651. The next prime is 566105263673. The reversal of 566105263661 is 166362501665.

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 not a de Polignac number, because 566105263661 - 2⁶ = 566105263597 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 (566105263651) 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, 40436090255 + ... + 40436090268.

It is an arithmetic number, because the mean of its divisors is an integer number (161744361048).

Almost surely, 2^566105263661 is an apocalyptic number.

It is an amenable number.

566105263661 is a deficient number, since it is larger than the sum of its proper divisors (80872180531).

566105263661 is an equidigital number, since it uses as much as digits as its factorization.

566105263661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80872180530.

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 566105263661 in words is "five hundred sixty-six billion, one hundred five million, two hundred sixty-three thousand, six hundred sixty-one".