5561665117 has 2 divisors, whose sum is σ = 5561665118. Its totient is φ = 5561665116.

The previous prime is 5561665097. The next prime is 5561665133. The reversal of 5561665117 is 7115661655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5533723321 + 27941796 = 74389^2 + 5286^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561665117 - 2¹¹ = 5561663069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561665517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780832558 + 2780832559.

It is an arithmetic number, because the mean of its divisors is an integer number (2780832559).

Almost surely, 2^5561665117 is an apocalyptic number.

It is an amenable number.

5561665117 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561665117 is an equidigital number, since it uses as much as digits as its factorization.

5561665117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 43.

The square root of 5561665117 is about 74576.5721724993. The cubic root of 5561665117 is about 1771.7466152385.

The spelling of 5561665117 in words is "five billion, five hundred sixty-one million, six hundred sixty-five thousand, one hundred seventeen".