165518702003 has 4 divisors (see below), whose sum is σ = 165520084368. Its totient is φ = 165517319640.

The previous prime is 165518701979. The next prime is 165518702009. The reversal of 165518702003 is 300207815561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165518702003 - 2⁶ = 165518701939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165518702009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492551 + ... + 757392.

It is an arithmetic number, because the mean of its divisors is an integer number (41380021092).

Almost surely, 2^165518702003 is an apocalyptic number.

165518702003 is a deficient number, since it is larger than the sum of its proper divisors (1382365).

165518702003 is a wasteful number, since it uses less digits than its factorization.

165518702003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382364.

The product of its (nonzero) digits is 50400, while the sum is 38.

The spelling of 165518702003 in words is "one hundred sixty-five billion, five hundred eighteen million, seven hundred two thousand, three".