165605333 has 4 divisors (see below), whose sum is σ = 166909440. Its totient is φ = 164301228.

The previous prime is 165605269. The next prime is 165605339. The reversal of 165605333 is 333506561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 333506561 = 17 ⋅19618033.

It is a cyclic number.

It is not a de Polignac number, because 165605333 - 2⁶ = 165605269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165605333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165605339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 651863 + ... + 652116.

It is an arithmetic number, because the mean of its divisors is an integer number (41727360).

Almost surely, 2^165605333 is an apocalyptic number.

It is an amenable number.

165605333 is a deficient number, since it is larger than the sum of its proper divisors (1304107).

165605333 is a wasteful number, since it uses less digits than its factorization.

165605333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304106.

The product of its (nonzero) digits is 24300, while the sum is 32.

The square root of 165605333 is about 12868.7735623874. The cubic root of 165605333 is about 549.1505708967.

The spelling of 165605333 in words is "one hundred sixty-five million, six hundred five thousand, three hundred thirty-three".