6566204855 has 16 divisors (see below), whose sum is σ = 9022324224. Its totient is φ = 4493918880.

The previous prime is 6566204849. The next prime is 6566204863. The reversal of 6566204855 is 5584026656.

It is not a de Polignac number, because 6566204855 - 2⁴ = 6566204839 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 161051 + ... + 197660.

It is an arithmetic number, because the mean of its divisors is an integer number (563895264).

Almost surely, 2^6566204855 is an apocalyptic number.

6566204855 is a deficient number, since it is larger than the sum of its proper divisors (2456119369).

6566204855 is a wasteful number, since it uses less digits than its factorization.

6566204855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359246.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The square root of 6566204855 is about 81032.1223651460. The cubic root of 6566204855 is about 1872.5703503509.

The spelling of 6566204855 in words is "six billion, five hundred sixty-six million, two hundred four thousand, eight hundred fifty-five".