165261330 is a `hidden beast` number, since 1 + 6 + 526 + 133 + 0 = 666.
165261330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a zygodrome in base 8.
It is an unprimeable number.
Almost surely, 2165261330 is an apocalyptic number.
165261330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 165261330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239500800).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
165261330 is a wasteful number, since it uses less digits than its factorization.
165261330 is an evil number, because the sum of its binary digits is even.
The square root of 165261330 is about 12855.4008105543. The cubic root of 165261330 is about 548.7700670498.
The spelling of 165261330 in words is "one hundred sixty-five million, two hundred sixty-one thousand, three hundred thirty".