5566668889 has 2 divisors, whose sum is σ = 5566668890. Its totient is φ = 5566668888.

The previous prime is 5566668869. The next prime is 5566668959. The reversal of 5566668889 is 9888666655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5114681289 + 451987600 = 71517^2 + 21260^2 .

It is a cyclic number.

It is not a de Polignac number, because 5566668889 - 2²⁷ = 5432451161 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (5566668839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783334444 + 2783334445.

It is an arithmetic number, because the mean of its divisors is an integer number (2783334445).

Almost surely, 2^5566668889 is an apocalyptic number.

It is an amenable number.

5566668889 is a deficient number, since it is larger than the sum of its proper divisors (1).

5566668889 is an equidigital number, since it uses as much as digits as its factorization.

5566668889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149299200, while the sum is 67.

The square root of 5566668889 is about 74610.1125116428. The cubic root of 5566668889 is about 1772.2777966106.

The spelling of 5566668889 in words is "five billion, five hundred sixty-six million, six hundred sixty-eight thousand, eight hundred eighty-nine".