166501666 has 8 divisors (see below), whose sum is σ = 249960384. Its totient is φ = 83181540.

The previous prime is 166501649. The next prime is 166501667. The reversal of 166501666 is 666105661.

166501666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (166501667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31590 + ... + 36481.

It is an arithmetic number, because the mean of its divisors is an integer number (31245048).

Almost surely, 2^166501666 is an apocalyptic number.

166501666 is a deficient number, since it is larger than the sum of its proper divisors (83458718).

166501666 is a wasteful number, since it uses less digits than its factorization.

166501666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69296.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 166501666 is about 12903.5524565912. The cubic root of 166501666 is about 550.1395414532.

The spelling of 166501666 in words is "one hundred sixty-six million, five hundred one thousand, six hundred sixty-six".