165404418 has 8 divisors (see below), whose sum is σ = 330808848. Its totient is φ = 55134804.

The previous prime is 165404411. The next prime is 165404423. The reversal of 165404418 is 814404561.

165404418 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

165404418 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (165404411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13783696 + ... + 13783707.

It is an arithmetic number, because the mean of its divisors is an integer number (41351106).

Almost surely, 2^165404418 is an apocalyptic number.

165404418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

165404418 is a wasteful number, since it uses less digits than its factorization.

165404418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27567408.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 165404418 is about 12860.9648938173. The cubic root of 165404418 is about 548.9284016502.

Adding to 165404418 its reverse (814404561), we get a palindrome (979808979).

The spelling of 165404418 in words is "one hundred sixty-five million, four hundred four thousand, four hundred eighteen".