165404133 has 8 divisors (see below), whose sum is σ = 245043200. Its totient is φ = 110269404.

The previous prime is 165404093. The next prime is 165404147. The reversal of 165404133 is 331404561.

165404133 is a `hidden beast` number, since 1 + 654 + 0 + 4 + 1 + 3 + 3 = 666.

It is not a de Polignac number, because 165404133 - 2⁶ = 165404069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6126079 = 165404133 / (1 + 6 + 5 + 4 + 0 + 4 + 1 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165404097 and 165404106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165400133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3063013 + ... + 3063066.

It is an arithmetic number, because the mean of its divisors is an integer number (30630400).

Almost surely, 2^165404133 is an apocalyptic number.

It is an amenable number.

165404133 is a deficient number, since it is larger than the sum of its proper divisors (79639067).

165404133 is an equidigital number, since it uses as much as digits as its factorization.

165404133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126088 (or 6126082 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 165404133 is about 12860.9538137729. The cubic root of 165404133 is about 548.9280863731.

Adding to 165404133 its reverse (331404561), we get a palindrome (496808694).

The spelling of 165404133 in words is "one hundred sixty-five million, four hundred four thousand, one hundred thirty-three".