166722 has 16 divisors (see below), whose sum is σ = 342912. Its totient is φ = 54000.

The previous prime is 166703. The next prime is 166723. The reversal of 166722 is 227661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166692 and 166701.

It is not an unprimeable number, because it can be changed into a prime (166723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154 + ... + 597.

It is an arithmetic number, because the mean of its divisors is an integer number (21432).

2¹⁶⁶⁷²² is an apocalyptic number.

166722 is an abundant number, since it is smaller than the sum of its proper divisors (176190).

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

166722 is a wasteful number, since it uses less digits than its factorization.

166722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793.

The product of its digits is 1008, while the sum is 24.

The square root of 166722 is about 408.3160540562. The cubic root of 166722 is about 55.0382103624.

It can be divided in two parts, 166 and 722, that added together give a palindrome (888).

The spelling of 166722 in words is "one hundred sixty-six thousand, seven hundred twenty-two".