165016503 has 12 divisors (see below), whose sum is σ = 246046528. Its totient is φ = 106462080.

The previous prime is 165016493. The next prime is 165016531. The reversal of 165016503 is 305610561.

It is a happy number.

165016503 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 1 + 650 + 3 = 666.

It is not a de Polignac number, because 165016503 - 2⁵ = 165016471 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165016903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295450 + ... + 296007.

Almost surely, 2^165016503 is an apocalyptic number.

165016503 is a deficient number, since it is larger than the sum of its proper divisors (81030025).

165016503 is a wasteful number, since it uses less digits than its factorization.

165016503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591494 (or 591491 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 165016503 is about 12845.8749410073. The cubic root of 165016503 is about 548.4989406463.

The spelling of 165016503 in words is "one hundred sixty-five million, sixteen thousand, five hundred three".