It is a happy number.
166320 is a `hidden beast` number, since 1 + 663 + 2 + 0 = 666.
It is a nialpdrome in base 6.
It is a zygodrome in base 3 and base 6.
It is a congruent number.
It is an unprimeable number.
166320 is a highly composite number, because it has more divisors than any smaller number.
166320 is a superabundant number, because it has a larger abundancy index than any smaller number.
2166320 is an apocalyptic number.
166320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 166320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357120).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
166320 is a wasteful number, since it uses less digits than its factorization.
166320 is an odious number, because the sum of its binary digits is odd.
The square root of 166320 is about 407.8234912312. The cubic root of 166320 is about 54.9939387260.
Adding to 166320 its reverse (23661), we get a palindrome (189981).
The spelling of 166320 in words is "one hundred sixty-six thousand, three hundred twenty".