166493 has 4 divisors (see below), whose sum is σ = 167328. Its totient is φ = 165660.

The previous prime is 166487. The next prime is 166541. The reversal of 166493 is 394661.

166493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 166493 - 2⁶ = 166429 is a prime.

It is a Duffinian 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 (166403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80 + ... + 582.

It is an arithmetic number, because the mean of its divisors is an integer number (41832).

2¹⁶⁶⁴⁹³ is an apocalyptic number.

It is an amenable number.

166493 is a deficient number, since it is larger than the sum of its proper divisors (835).

166493 is an equidigital number, since it uses as much as digits as its factorization.

166493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834.

The product of its digits is 3888, while the sum is 29.

The square root of 166493 is about 408.0355376680. The cubic root of 166493 is about 55.0129996820.

Subtracting from 166493 its sum of digits (29), we obtain a square (166464 = 408²).

The spelling of 166493 in words is "one hundred sixty-six thousand, four hundred ninety-three".