5665661610055 has 4 divisors (see below), whose sum is σ = 6798793932072. Its totient is φ = 4532529288040.

The previous prime is 5665661609989. The next prime is 5665661610067. The reversal of 5665661610055 is 5500161665665.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-5665661610055 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5665661609984 and 5665661610011.

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 3 ways as a sum of consecutive naturals, for example, 566566161001 + ... + 566566161010.

It is an arithmetic number, because the mean of its divisors is an integer number (1699698483018).

Almost surely, 2^{5665661610055} is an apocalyptic number.

5665661610055 is a deficient number, since it is larger than the sum of its proper divisors (1133132322017).

5665661610055 is a wasteful number, since it uses less digits than its factorization.

5665661610055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133132322016.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 5665661610055 in words is "five trillion, six hundred sixty-five billion, six hundred sixty-one million, six hundred ten thousand, fifty-five".