166189000 has 32 divisors (see below), whose sum is σ = 388884600. Its totient is φ = 66475200.

The previous prime is 166188989. The next prime is 166189013. The reversal of 166189000 is 981661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33616804 + 132572196 = 5798^2 + 11514^2 .

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, 82095 + ... + 84094.

Almost surely, 2^166189000 is an apocalyptic number.

166189000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166189000 is an abundant number, since it is smaller than the sum of its proper divisors (222695600).

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

166189000 is a wasteful number, since it uses less digits than its factorization.

166189000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166210 (or 166196 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 166189000 is about 12891.4312626644. The cubic root of 166189000 is about 549.7949648966.

The spelling of 166189000 in words is "one hundred sixty-six million, one hundred eighty-nine thousand".