165411011 has 4 divisors (see below), whose sum is σ = 165751152. Its totient is φ = 165070872.

The previous prime is 165410951. The next prime is 165411019. The reversal of 165411011 is 110114561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165411011 - 2¹⁰ = 165409987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165411019) 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 3 ways as a sum of consecutive naturals, for example, 169340 + ... + 170313.

It is an arithmetic number, because the mean of its divisors is an integer number (41437788).

Almost surely, 2^165411011 is an apocalyptic number.

165411011 is a deficient number, since it is larger than the sum of its proper divisors (340141).

165411011 is an equidigital number, since it uses as much as digits as its factorization.

165411011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340140.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 165411011 is about 12861.2212095119. The cubic root of 165411011 is about 548.9356949598.

Adding to 165411011 its reverse (110114561), we get a palindrome (275525572).

The spelling of 165411011 in words is "one hundred sixty-five million, four hundred eleven thousand, eleven".