166906906 has 32 divisors (see below), whose sum is σ = 276278400. Its totient is φ = 75623724.

The previous prime is 166906897. The next prime is 166906921. The reversal of 166906906 is 609609661.

166906906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7256811 + ... + 7256833.

It is an arithmetic number, because the mean of its divisors is an integer number (8633700).

Almost surely, 2^166906906 is an apocalyptic number.

166906906 is a deficient number, since it is larger than the sum of its proper divisors (109371494).

166906906 is an frugal number, since it uses more digits than its factorization.

166906906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 166906906 is about 12919.2455662086. The cubic root of 166906906 is about 550.5854988041.

The spelling of 166906906 in words is "one hundred sixty-six million, nine hundred six thousand, nine hundred six".