166506106566 has 16 divisors (see below), whose sum is σ = 333021072384. Its totient is φ = 55500558984.

The previous prime is 166506106519. The next prime is 166506106573. The reversal of 166506106566 is 665601605661.

166506106566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 110910 + ... + 587633.

It is an arithmetic number, because the mean of its divisors is an integer number (20813817024).

Almost surely, 2^166506106566 is an apocalyptic number.

166506106566 is an abundant number, since it is smaller than the sum of its proper divisors (166514965818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166506106566 is a wasteful number, since it uses less digits than its factorization.

166506106566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738275.

The product of its (nonzero) digits is 1166400, while the sum is 48.

It can be divided in two parts, 16650 and 6106566, that added together give a palindrome (6123216).

The spelling of 166506106566 in words is "one hundred sixty-six billion, five hundred six million, one hundred six thousand, five hundred sixty-six".