5665566015655 has 64 divisors (see below), whose sum is σ = 8385352335360. Its totient is φ = 3578516527104.

The previous prime is 5665566015649. The next prime is 5665566015661. The reversal of 5665566015655 is 5565106655665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (5665566015649) and next prime (5665566015661).

It is a cyclic number.

It is not a de Polignac number, because 5665566015655 - 2²⁹ = 5665029144743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5665566015593 and 5665566015602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 861417727 + ... + 861424303.

It is an arithmetic number, because the mean of its divisors is an integer number (131021130240).

Almost surely, 2^{5665566015655} is an apocalyptic number.

5665566015655 is a deficient number, since it is larger than the sum of its proper divisors (2719786319705).

5665566015655 is a wasteful number, since it uses less digits than its factorization.

5665566015655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10328.

The product of its (nonzero) digits is 121500000, while the sum is 61.

The spelling of 5665566015655 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-six million, fifteen thousand, six hundred fifty-five".