566140521721 has 4 divisors (see below), whose sum is σ = 566163060112. Its totient is φ = 566117983332.

The previous prime is 566140521701. The next prime is 566140521731. The reversal of 566140521721 is 127125041665.

566140521721 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 cyclic number.

It is not a de Polignac number, because 566140521721 - 2⁵ = 566140521689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (566140521701) 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, 11231475 + ... + 11281768.

It is an arithmetic number, because the mean of its divisors is an integer number (141540765028).

Almost surely, 2^566140521721 is an apocalyptic number.

It is an amenable number.

566140521721 is a deficient number, since it is larger than the sum of its proper divisors (22538391).

566140521721 is a wasteful number, since it uses less digits than its factorization.

566140521721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22538390.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 566140521721 in words is "five hundred sixty-six billion, one hundred forty million, five hundred twenty-one thousand, seven hundred twenty-one".