165669443 has 2 divisors, whose sum is σ = 165669444. Its totient is φ = 165669442.

The previous prime is 165669421. The next prime is 165669503. The reversal of 165669443 is 344966561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165669443 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 165669394 and 165669403.

It is not a weakly prime, because it can be changed into another prime (165665443) 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, 82834721 + 82834722.

It is an arithmetic number, because the mean of its divisors is an integer number (82834722).

Almost surely, 2^165669443 is an apocalyptic number.

165669443 is a deficient number, since it is larger than the sum of its proper divisors (1).

165669443 is an equidigital number, since it uses as much as digits as its factorization.

165669443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The square root of 165669443 is about 12871.2642347207. The cubic root of 165669443 is about 549.2214250984.

The spelling of 165669443 in words is "one hundred sixty-five million, six hundred sixty-nine thousand, four hundred forty-three".