165366011 has 4 divisors (see below), whose sum is σ = 166476000. Its totient is φ = 164256024.

The previous prime is 165366007. The next prime is 165366023. The reversal of 165366011 is 110663561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110663561 = 331 ⋅334331.

It is a cyclic number.

It is not a de Polignac number, because 165366011 - 2² = 165366007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165366001) 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, 554771 + ... + 555068.

It is an arithmetic number, because the mean of its divisors is an integer number (41619000).

Almost surely, 2^165366011 is an apocalyptic number.

165366011 is a deficient number, since it is larger than the sum of its proper divisors (1109989).

165366011 is a wasteful number, since it uses less digits than its factorization.

165366011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109988.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 165366011 is about 12859.4716454448. The cubic root of 165366011 is about 548.8859111988.

The spelling of 165366011 in words is "one hundred sixty-five million, three hundred sixty-six thousand, eleven".