5566645400917 has 2 divisors, whose sum is σ = 5566645400918. Its totient is φ = 5566645400916.

The previous prime is 5566645400893. The next prime is 5566645400969. The reversal of 5566645400917 is 7190045466655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5476938561796 + 89706839121 = 2340286^2 + 299511^2 .

It is a cyclic number.

It is not a de Polignac number, because 5566645400917 - 2¹⁹ = 5566644876629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5566645400417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783322700458 + 2783322700459.

It is an arithmetic number, because the mean of its divisors is an integer number (2783322700459).

Almost surely, 2^{5566645400917} is an apocalyptic number.

It is an amenable number.

5566645400917 is a deficient number, since it is larger than the sum of its proper divisors (1).

5566645400917 is an equidigital number, since it uses as much as digits as its factorization.

5566645400917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216000, while the sum is 58.

The spelling of 5566645400917 in words is "five trillion, five hundred sixty-six billion, six hundred forty-five million, four hundred thousand, nine hundred seventeen".