5516605515665 has 16 divisors (see below), whose sum is σ = 6669035420112. Its totient is φ = 4380552827904.

The previous prime is 5516605515649. The next prime is 5516605515671. The reversal of 5516605515665 is 5665155066155.

It can be written as a sum of positive squares in 8 ways, for example, as 1177066595329 + 4339538920336 = 1084927^2 + 2083156^2 .

It is a cyclic number.

It is not a de Polignac number, because 5516605515665 - 2⁴ = 5516605515649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5516605515665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5376167 + ... + 6319523.

It is an arithmetic number, because the mean of its divisors is an integer number (416814713757).

Almost surely, 2^{5516605515665} is an apocalyptic number.

It is an amenable number.

5516605515665 is a deficient number, since it is larger than the sum of its proper divisors (1152429904447).

5516605515665 is a wasteful number, since it uses less digits than its factorization.

5516605515665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952036.

The product of its (nonzero) digits is 20250000, while the sum is 56.

The spelling of 5516605515665 in words is "five trillion, five hundred sixteen billion, six hundred five million, five hundred fifteen thousand, six hundred sixty-five".