166489506 has 48 divisors (see below), whose sum is σ = 379745184. Its totient is φ = 54657504.

The previous prime is 166489501. The next prime is 166489523. The reversal of 166489506 is 605984661.

166489506 is a `hidden beast` number, since 1 + 6 + 64 + 89 + 506 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166489501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30006 + ... + 35118.

It is an arithmetic number, because the mean of its divisors is an integer number (7911358).

Almost surely, 2^166489506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166489506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189872592).

166489506 is an abundant number, since it is smaller than the sum of its proper divisors (213255678).

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

166489506 is an equidigital number, since it uses as much as digits as its factorization.

166489506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197 (or 5185 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 166489506 is about 12903.0812599162. The cubic root of 166489506 is about 550.1261484747.

The spelling of 166489506 in words is "one hundred sixty-six million, four hundred eighty-nine thousand, five hundred six".