165016603 has 8 divisors (see below), whose sum is σ = 174953520. Its totient is φ = 155105280.

The previous prime is 165016597. The next prime is 165016619. The reversal of 165016603 is 306610561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165016603 - 2⁹ = 165016091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165016673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7803 + ... + 19771.

It is an arithmetic number, because the mean of its divisors is an integer number (21869190).

Almost surely, 2^165016603 is an apocalyptic number.

165016603 is a deficient number, since it is larger than the sum of its proper divisors (9936917).

165016603 is a wasteful number, since it uses less digits than its factorization.

165016603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12797.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 165016603 is about 12845.8788333068. The cubic root of 165016603 is about 548.4990514430.

It can be divided in two parts, 16501 and 6603, that added together give a square (23104 = 152²).

The spelling of 165016603 in words is "one hundred sixty-five million, sixteen thousand, six hundred three".