165440016 has 80 divisors (see below), whose sum is σ = 542723200. Its totient is φ = 47267712.

The previous prime is 165439933. The next prime is 165440027. The reversal of 165440016 is 610044561.

165440016 is a `hidden beast` number, since 1 + 654 + 4 + 0 + 0 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24331 + ... + 30378.

It is an arithmetic number, because the mean of its divisors is an integer number (6784040).

Almost surely, 2^165440016 is an apocalyptic number.

165440016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165440016 is an abundant number, since it is smaller than the sum of its proper divisors (377283184).

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

165440016 is a wasteful number, since it uses less digits than its factorization.

165440016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54733 (or 54721 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 165440016 is about 12862.3487746212. The cubic root of 165440016 is about 548.9677785742.

Adding to 165440016 its reverse (610044561), we get a palindrome (775484577).

The spelling of 165440016 in words is "one hundred sixty-five million, four hundred forty thousand, sixteen".