165550003 has 2 divisors, whose sum is σ = 165550004. Its totient is φ = 165550002.

The previous prime is 165550001. The next prime is 165550019. The reversal of 165550003 is 300055561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165550003 - 2¹ = 165550001 is a prime.

Together with 165550001, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 165550003.

It is not a weakly prime, because it can be changed into another prime (165550001) 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, 82775001 + 82775002.

It is an arithmetic number, because the mean of its divisors is an integer number (82775002).

Almost surely, 2^165550003 is an apocalyptic number.

165550003 is a deficient number, since it is larger than the sum of its proper divisors (1).

165550003 is an equidigital number, since it uses as much as digits as its factorization.

165550003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 165550003 is about 12866.6236052820. The cubic root of 165550003 is about 549.0894056249.

The spelling of 165550003 in words is "one hundred sixty-five million, five hundred fifty thousand, three".