566038342854221 has 2 divisors, whose sum is σ = 566038342854222. Its totient is φ = 566038342854220.

The previous prime is 566038342854209. The next prime is 566038342854251. The reversal of 566038342854221 is 122458243830665.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452183680981321 + 113854661872900 = 21264611^2 + 10670270^2 .

It is a cyclic number.

It is not a de Polignac number, because 566038342854221 - 2¹⁸ = 566038342592077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566038342854251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283019171427110 + 283019171427111.

It is an arithmetic number, because the mean of its divisors is an integer number (283019171427111).

Almost surely, 2^{566038342854221} is an apocalyptic number.

It is an amenable number.

566038342854221 is a deficient number, since it is larger than the sum of its proper divisors (1).

566038342854221 is an equidigital number, since it uses as much as digits as its factorization.

566038342854221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66355200, while the sum is 59.

The spelling of 566038342854221 in words is "five hundred sixty-six trillion, thirty-eight billion, three hundred forty-two million, eight hundred fifty-four thousand, two hundred twenty-one".