166055666 has 16 divisors (see below), whose sum is σ = 287867520. Its totient is φ = 70366560.

The previous prime is 166055641. The next prime is 166055671. The reversal of 166055666 is 666550661.

It is a Curzon 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, 65390 + ... + 67881.

It is an arithmetic number, because the mean of its divisors is an integer number (17991720).

Almost surely, 2^166055666 is an apocalyptic number.

166055666 is a deficient number, since it is larger than the sum of its proper divisors (121811854).

166055666 is a wasteful number, since it uses less digits than its factorization.

166055666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133369.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 166055666 is about 12886.2588054097. The cubic root of 166055666 is about 549.6478914335.

The spelling of 166055666 in words is "one hundred sixty-six million, fifty-five thousand, six hundred sixty-six".