166705740 is a `hidden beast` number, since 16 + 6 + 70 + 574 + 0 = 666.
166705740 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is an unprimeable number.
Almost surely, 2166705740 is an apocalyptic number.
166705740 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 166705740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270191376).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
166705740 is a wasteful number, since it uses less digits than its factorization.
166705740 is an odious number, because the sum of its binary digits is odd.
The square root of 166705740 is about 12911.4577023665. The cubic root of 166705740 is about 550.3642105568.
The spelling of 166705740 in words is "one hundred sixty-six million, seven hundred five thousand, seven hundred forty".