165636033 has 4 divisors (see below), whose sum is σ = 220848048. Its totient is φ = 110424020.

The previous prime is 165636019. The next prime is 165636047. The reversal of 165636033 is 330636561.

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: 330636561 = 3 ⋅110212187.

It is an interprime number because it is at equal distance from previous prime (165636019) and next prime (165636047).

It is a cyclic number.

It is not a de Polignac number, because 165636033 - 2⁶ = 165635969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165635985 and 165636003.

It is not an unprimeable number, because it can be changed into a prime (165636833) 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, 27606003 + ... + 27606008.

It is an arithmetic number, because the mean of its divisors is an integer number (55212012).

Almost surely, 2^165636033 is an apocalyptic number.

It is an amenable number.

165636033 is a deficient number, since it is larger than the sum of its proper divisors (55212015).

165636033 is an equidigital number, since it uses as much as digits as its factorization.

165636033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55212014.

The product of its (nonzero) digits is 29160, while the sum is 33.

The square root of 165636033 is about 12869.9663169722. The cubic root of 165636033 is about 549.1845027364.

The spelling of 165636033 in words is "one hundred sixty-five million, six hundred thirty-six thousand, thirty-three".