165770233 has 2 divisors, whose sum is σ = 165770234. Its totient is φ = 165770232.

The previous prime is 165770221. The next prime is 165770239. The reversal of 165770233 is 332077561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161722089 + 4048144 = 12717^2 + 2012^2 .

It is an emirp because it is prime and its reverse (332077561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165770233 - 2⁵ = 165770201 is a prime.

It is not a weakly prime, because it can be changed into another prime (165770239) 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 as a sum of consecutive naturals, namely, 82885116 + 82885117.

It is an arithmetic number, because the mean of its divisors is an integer number (82885117).

Almost surely, 2^165770233 is an apocalyptic number.

It is an amenable number.

165770233 is a deficient number, since it is larger than the sum of its proper divisors (1).

165770233 is an equidigital number, since it uses as much as digits as its factorization.

165770233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 165770233 is about 12875.1789502127. The cubic root of 165770233 is about 549.3327809896.

The spelling of 165770233 in words is "one hundred sixty-five million, seven hundred seventy thousand, two hundred thirty-three".