566345088466621 has 2 divisors, whose sum is σ = 566345088466622. Its totient is φ = 566345088466620.

The previous prime is 566345088466601. The next prime is 566345088466669. The reversal of 566345088466621 is 126664880543665.

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., 476322375185721 + 90022713280900 = 21824811^2 + 9488030^2 .

It is a cyclic number.

It is not a de Polignac number, because 566345088466621 - 2⁵ = 566345088466589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (566345088466601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283172544233310 + 283172544233311.

It is an arithmetic number, because the mean of its divisors is an integer number (283172544233311).

Almost surely, 2^{566345088466621} is an apocalyptic number.

It is an amenable number.

566345088466621 is a deficient number, since it is larger than the sum of its proper divisors (1).

566345088466621 is an equidigital number, since it uses as much as digits as its factorization.

566345088466621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1194393600, while the sum is 70.

The spelling of 566345088466621 in words is "five hundred sixty-six trillion, three hundred forty-five billion, eighty-eight million, four hundred sixty-six thousand, six hundred twenty-one".