165534330 has 64 divisors (see below), whose sum is σ = 429287040. Its totient is φ = 40609536.

The previous prime is 165534323. The next prime is 165534331. The reversal of 165534330 is 33435561.

It is a happy number.

It is a super-2 number, since 2×165534330² = 54803228817097800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (165534331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162904 + ... + 163916.

It is an arithmetic number, because the mean of its divisors is an integer number (6707610).

Almost surely, 2^165534330 is an apocalyptic number.

165534330 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 165534330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214643520).

165534330 is an abundant number, since it is smaller than the sum of its proper divisors (263752710).

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

165534330 is a wasteful number, since it uses less digits than its factorization.

165534330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 165534330 is about 12866.0145344236. The cubic root of 165534330 is about 549.0720772252.

Adding to 165534330 its reverse (33435561), we get a palindrome (198969891).

The spelling of 165534330 in words is "one hundred sixty-five million, five hundred thirty-four thousand, three hundred thirty".