166827 has 4 divisors (see below), whose sum is σ = 222440. Its totient is φ = 111216.

The previous prime is 166823. The next prime is 166841. The reversal of 166827 is 728661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728661 = 3 ⋅242887.

It is not a de Polignac number, because 166827 - 2² = 166823 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 166794 and 166803.

It is not an unprimeable number, because it can be changed into a prime (166823) 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, 27802 + ... + 27807.

It is an arithmetic number, because the mean of its divisors is an integer number (55610).

2¹⁶⁶⁸²⁷ is an apocalyptic number.

166827 is a deficient number, since it is larger than the sum of its proper divisors (55613).

166827 is an equidigital number, since it uses as much as digits as its factorization.

166827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55612.

The product of its digits is 4032, while the sum is 30.

The square root of 166827 is about 408.4446106879. Note that the first 3 decimals coincide. The cubic root of 166827 is about 55.0497621259.

The spelling of 166827 in words is "one hundred sixty-six thousand, eight hundred twenty-seven".