165664230 has 64 divisors (see below), whose sum is σ = 420076800. Its totient is φ = 41696640.

The previous prime is 165664199. The next prime is 165664243. The reversal of 165664230 is 32466561.

It is a junction number, because it is equal to n+sod(n) for n = 165664191 and 165664200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289845 + ... + 290415.

It is an arithmetic number, because the mean of its divisors is an integer number (6563700).

Almost surely, 2^165664230 is an apocalyptic number.

165664230 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 165664230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210038400).

165664230 is an abundant number, since it is smaller than the sum of its proper divisors (254412570).

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

165664230 is a wasteful number, since it uses less digits than its factorization.

165664230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 165664230 is about 12871.0617277674. The cubic root of 165664230 is about 549.2156643875.

The spelling of 165664230 in words is "one hundred sixty-five million, six hundred sixty-four thousand, two hundred thirty".