5665566000509 has 2 divisors, whose sum is σ = 5665566000510. Its totient is φ = 5665566000508.

The previous prime is 5665566000491. The next prime is 5665566000529. The reversal of 5665566000509 is 9050006655665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3205342380409 + 2460223620100 = 1790347^2 + 1568510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5665566000509 is a prime.

It is a super-2 number, since 2×5665566000509² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5665566000529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832783000254 + 2832783000255.

It is an arithmetic number, because the mean of its divisors is an integer number (2832783000255).

Almost surely, 2^{5665566000509} is an apocalyptic number.

It is an amenable number.

5665566000509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665566000509 is an equidigital number, since it uses as much as digits as its factorization.

5665566000509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290000, while the sum is 53.

The spelling of 5665566000509 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-six million, five hundred nine", and thus it is an aban number.