5665561665125 has 8 divisors (see below), whose sum is σ = 7070620958232. Its totient is φ = 4532449332000.

The previous prime is 5665561665119. The next prime is 5665561665143. The reversal of 5665561665125 is 5215661655665.

It can be written as a sum of positive squares in 4 ways, for example, as 85681485796 + 5579880179329 = 292714^2 + 2362177^2 .

It is not a de Polignac number, because 5665561665125 - 2⁴ = 5665561665109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 22662246536 + ... + 22662246785.

It is an arithmetic number, because the mean of its divisors is an integer number (883827619779).

Almost surely, 2^{5665561665125} is an apocalyptic number.

It is an amenable number.

5665561665125 is a deficient number, since it is larger than the sum of its proper divisors (1405059293107).

5665561665125 is an equidigital number, since it uses as much as digits as its factorization.

5665561665125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45324493336 (or 45324493326 counting only the distinct ones).

The product of its digits is 48600000, while the sum is 59.

The spelling of 5665561665125 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-one million, six hundred sixty-five thousand, one hundred twenty-five".