166486 has 4 divisors (see below), whose sum is σ = 249732. Its totient is φ = 83242.

The previous prime is 166471. The next prime is 166487. The reversal of 166486 is 684661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 684661 = 29 ⋅23609.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166487) by changing a digit.

166486 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41620 + ... + 41623.

It is an arithmetic number, because the mean of its divisors is an integer number (62433).

2¹⁶⁶⁴⁸⁶ is an apocalyptic number.

166486 is a deficient number, since it is larger than the sum of its proper divisors (83246).

166486 is an equidigital number, since it uses as much as digits as its factorization.

166486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83245.

The product of its digits is 6912, while the sum is 31.

The square root of 166486 is about 408.0269598936. The cubic root of 166486 is about 55.0122286858.

The spelling of 166486 in words is "one hundred sixty-six thousand, four hundred eighty-six".