165440330 has 32 divisors (see below), whose sum is σ = 332797248. Its totient is φ = 58691200.

The previous prime is 165440291. The next prime is 165440339. The reversal of 165440330 is 33044561.

It is a self number, because there is not a number n which added to its sum of digits gives 165440330.

It is not an unprimeable number, because it can be changed into a prime (165440339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13832 + ... + 22851.

It is an arithmetic number, because the mean of its divisors is an integer number (10399914).

Almost surely, 2^165440330 is an apocalyptic number.

165440330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165440330 is an abundant number, since it is smaller than the sum of its proper divisors (167356918).

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

165440330 is a wasteful number, since it uses less digits than its factorization.

165440330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36742.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 165440330 is about 12862.3609807842. The cubic root of 165440330 is about 548.9681258819.

Adding to 165440330 its reverse (33044561), we get a palindrome (198484891).

The spelling of 165440330 in words is "one hundred sixty-five million, four hundred forty thousand, three hundred thirty".