165066211 has 4 divisors (see below), whose sum is σ = 165930624. Its totient is φ = 164201800.

The previous prime is 165066203. The next prime is 165066229. The reversal of 165066211 is 112660561.

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 165066211 - 2³ = 165066203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165066211.

It is not an unprimeable number, because it can be changed into a prime (165066911) 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, 431920 + ... + 432301.

It is an arithmetic number, because the mean of its divisors is an integer number (41482656).

Almost surely, 2^165066211 is an apocalyptic number.

165066211 is a deficient number, since it is larger than the sum of its proper divisors (864413).

165066211 is an equidigital number, since it uses as much as digits as its factorization.

165066211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864412.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 165066211 is about 12847.8095798467. The cubic root of 165066211 is about 548.5540099831.

The spelling of 165066211 in words is "one hundred sixty-five million, sixty-six thousand, two hundred eleven".