166890170 has 16 divisors (see below), whose sum is σ = 300696840. Its totient is φ = 66690624.

The previous prime is 166890169. The next prime is 166890187. The reversal of 166890170 is 71098661.

It can be written as a sum of positive squares in 4 ways, for example, as 162894169 + 3996001 = 12763^2 + 1999^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3296 + ... + 18564.

Almost surely, 2^166890170 is an apocalyptic number.

166890170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166890170 is a deficient number, since it is larger than the sum of its proper divisors (133806670).

166890170 is a wasteful number, since it uses less digits than its factorization.

166890170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16369.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 166890170 is about 12918.5978341305. The cubic root of 166890170 is about 550.5670955174.

The spelling of 166890170 in words is "one hundred sixty-six million, eight hundred ninety thousand, one hundred seventy".