5665565006661 has 16 divisors (see below), whose sum is σ = 8633400336000. Its totient is φ = 3237406310208.

The previous prime is 5665565006641. The next prime is 5665565006669. The reversal of 5665565006661 is 1666005655665.

It is not a de Polignac number, because 5665565006661 - 2⁹ = 5665565006149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665565006669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1290486 + ... + 3605063.

It is an arithmetic number, because the mean of its divisors is an integer number (539587521000).

Almost surely, 2^{5665565006661} is an apocalyptic number.

It is an amenable number.

5665565006661 is a deficient number, since it is larger than the sum of its proper divisors (2967835329339).

5665565006661 is a wasteful number, since it uses less digits than its factorization.

5665565006661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950668.

The product of its (nonzero) digits is 29160000, while the sum is 57.

The spelling of 5665565006661 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-five million, six thousand, six hundred sixty-one".