6555566161 has 8 divisors (see below), whose sum is σ = 6709155200. Its totient is φ = 6402028752.

The previous prime is 6555566153. The next prime is 6555566167. The reversal of 6555566161 is 1616655556.

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 6555566161 - 2³ = 6555566153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6555566167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387271 + ... + 403843.

It is an arithmetic number, because the mean of its divisors is an integer number (838644400).

Almost surely, 2^6555566161 is an apocalyptic number.

It is an amenable number.

6555566161 is a deficient number, since it is larger than the sum of its proper divisors (153589039).

6555566161 is a wasteful number, since it uses less digits than its factorization.

6555566161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25815.

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

The square root of 6555566161 is about 80966.4508361334. The cubic root of 6555566161 is about 1871.5584785892.

The spelling of 6555566161 in words is "six billion, five hundred fifty-five million, five hundred sixty-six thousand, one hundred sixty-one".