166501085 has 8 divisors (see below), whose sum is σ = 210317280. Its totient is φ = 126190224.

The previous prime is 166501079. The next prime is 166501087. The reversal of 166501085 is 580105661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 166501085 - 2⁶ = 166501021 is a prime.

It is a super-2 number, since 2×166501085² = 55445222612354450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166501087) by changing a digit.

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, 876227 + ... + 876416.

It is an arithmetic number, because the mean of its divisors is an integer number (26289660).

Almost surely, 2^166501085 is an apocalyptic number.

It is an amenable number.

166501085 is a deficient number, since it is larger than the sum of its proper divisors (43816195).

166501085 is a wasteful number, since it uses less digits than its factorization.

166501085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752667.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 166501085 is about 12903.5299433915. The cubic root of 166501085 is about 550.1389015568.

The spelling of 166501085 in words is "one hundred sixty-six million, five hundred one thousand, eighty-five".