166026 has 32 divisors (see below), whose sum is σ = 391680. Its totient is φ = 45936.

The previous prime is 166021. The next prime is 166027. The reversal of 166026 is 620661.

166026 is nontrivially palindromic in base 4.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 165993 and 166011.

It is not an unprimeable number, because it can be changed into a prime (166021) by changing a digit.

166026 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 in 15 ways as a sum of consecutive naturals, for example, 2445 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2¹⁶⁶⁰²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195840).

166026 is an abundant number, since it is smaller than the sum of its proper divisors (225654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166026 is a wasteful number, since it uses less digits than its factorization.

166026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 166026 is about 407.4628817451. The cubic root of 166026 is about 54.9615157781.

Adding to 166026 its reverse (620661), we get a palindrome (786687).

The spelling of 166026 in words is "one hundred sixty-six thousand, twenty-six".