166506 has 8 divisors (see below), whose sum is σ = 333024. Its totient is φ = 55500.

The previous prime is 166487. The next prime is 166541. The reversal of 166506 is 605661.

It is a sphenic number, since it is the product of 3 distinct primes.

166506 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13870 + ... + 13881.

It is an arithmetic number, because the mean of its divisors is an integer number (41628).

2¹⁶⁶⁵⁰⁶ is an apocalyptic number.

166506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166506 is a wasteful number, since it uses less digits than its factorization.

166506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27756.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 166506 is about 408.0514673420. The cubic root of 166506 is about 55.0144314747.

The spelling of 166506 in words is "one hundred sixty-six thousand, five hundred six".