166893 has 4 divisors (see below), whose sum is σ = 222528. Its totient is φ = 111260.

The previous prime is 166871. The next prime is 166909. The reversal of 166893 is 398661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 398661 = 3 ⋅132887.

It is a cyclic number.

It is not a de Polignac number, because 166893 - 2⁵ = 166861 is a prime.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27813 + ... + 27818.

It is an arithmetic number, because the mean of its divisors is an integer number (55632).

2¹⁶⁶⁸⁹³ is an apocalyptic number.

It is an amenable number.

166893 is a deficient number, since it is larger than the sum of its proper divisors (55635).

166893 is an equidigital number, since it uses as much as digits as its factorization.

166893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55634.

The product of its digits is 7776, while the sum is 33.

The square root of 166893 is about 408.5253970073. The cubic root of 166893 is about 55.0570207536.

The spelling of 166893 in words is "one hundred sixty-six thousand, eight hundred ninety-three".