165404004 has 48 divisors (see below), whose sum is σ = 397365696. Its totient is φ = 53516800.

The previous prime is 165403993. The next prime is 165404009. The reversal of 165404004 is 400404561.

165404004 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165404009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110944 + ... + 112424.

It is an arithmetic number, because the mean of its divisors is an integer number (8278452).

Almost surely, 2^165404004 is an apocalyptic number.

It is an amenable number.

165404004 is an abundant number, since it is smaller than the sum of its proper divisors (231961692).

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

165404004 is a wasteful number, since it uses less digits than its factorization.

165404004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 165404004 is about 12860.9487985918. The cubic root of 165404004 is about 548.9279436686.

Adding to 165404004 its reverse (400404561), we get a palindrome (565808565).

The spelling of 165404004 in words is "one hundred sixty-five million, four hundred four thousand, four".