5566165561 has 8 divisors (see below), whose sum is σ = 6073056864. Its totient is φ = 5059420320.

The previous prime is 5566165471. The next prime is 5566165589. The reversal of 5566165561 is 1655616655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5566165561 - 2¹⁷ = 5566034489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5566165261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52650 + ... + 117916.

It is an arithmetic number, because the mean of its divisors is an integer number (759132108).

Almost surely, 2^5566165561 is an apocalyptic number.

It is an amenable number.

5566165561 is a deficient number, since it is larger than the sum of its proper divisors (506891303).

5566165561 is a wasteful number, since it uses less digits than its factorization.

5566165561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73031.

The product of its digits is 810000, while the sum is 46.

The square root of 5566165561 is about 74606.7393805680. The cubic root of 5566165561 is about 1772.2243796304.

The spelling of 5566165561 in words is "five billion, five hundred sixty-six million, one hundred sixty-five thousand, five hundred sixty-one".