166564906 has 16 divisors (see below), whose sum is σ = 267458400. Its totient is φ = 77560848.

The previous prime is 166564897. The next prime is 166564907. The reversal of 166564906 is 609465661.

166564906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166564907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34905 + ... + 39388.

It is an arithmetic number, because the mean of its divisors is an integer number (16716150).

Almost surely, 2^166564906 is an apocalyptic number.

166564906 is a deficient number, since it is larger than the sum of its proper divisors (100893494).

166564906 is a wasteful number, since it uses less digits than its factorization.

166564906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74373.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 166564906 is about 12906.0027119167. The cubic root of 166564906 is about 550.2091832405.

The spelling of 166564906 in words is "one hundred sixty-six million, five hundred sixty-four thousand, nine hundred six".