166966566 has 32 divisors (see below), whose sum is σ = 378551040. Its totient is φ = 48669984.

The previous prime is 166966561. The next prime is 166966573. The reversal of 166966566 is 665669661.

166966566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166966561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54850 + ... + 57813.

It is an arithmetic number, because the mean of its divisors is an integer number (11829720).

Almost surely, 2^166966566 is an apocalyptic number.

166966566 is an abundant number, since it is smaller than the sum of its proper divisors (211584474).

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

166966566 is a wasteful number, since it uses less digits than its factorization.

166966566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112700.

The product of its digits is 2099520, while the sum is 51.

The square root of 166966566 is about 12921.5543182699. The cubic root of 166966566 is about 550.6510922910.

The spelling of 166966566 in words is "one hundred sixty-six million, nine hundred sixty-six thousand, five hundred sixty-six".