6561066043 has 24 divisors (see below), whose sum is σ = 7993229472. Its totient is φ = 5359584384.

The previous prime is 6561066023. The next prime is 6561066049. The reversal of 6561066043 is 3406601656.

6561066043 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-6561066043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6561065993 and 6561066011.

It is not an unprimeable number, because it can be changed into a prime (6561066049) 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 23 ways as a sum of consecutive naturals, for example, 301671 + ... + 322687.

It is an arithmetic number, because the mean of its divisors is an integer number (333051228).

Almost surely, 2^6561066043 is an apocalyptic number.

6561066043 is a deficient number, since it is larger than the sum of its proper divisors (1432163429).

6561066043 is a wasteful number, since it uses less digits than its factorization.

6561066043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21331 (or 21324 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6561066043 is about 81000.4076718136. The cubic root of 6561066043 is about 1872.0817221603.

Adding to 6561066043 its reverse (3406601656), we get a palindrome (9967667699).

The spelling of 6561066043 in words is "six billion, five hundred sixty-one million, sixty-six thousand, forty-three".