5561066106566 has 8 divisors (see below), whose sum is σ = 8341617034920. Its totient is φ = 2780527094928.

The previous prime is 5561066106559. The next prime is 5561066106649. The reversal of 5561066106566 is 6656016601655.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703231 + ... + 3744746.

It is an arithmetic number, because the mean of its divisors is an integer number (1042702129365).

Almost surely, 2^{5561066106566} is an apocalyptic number.

5561066106566 is a deficient number, since it is larger than the sum of its proper divisors (2780550928354).

5561066106566 is a wasteful number, since it uses less digits than its factorization.

5561066106566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958358.

The product of its (nonzero) digits is 5832000, while the sum is 53.

The spelling of 5561066106566 in words is "five trillion, five hundred sixty-one billion, sixty-six million, one hundred six thousand, five hundred sixty-six".