665103 has 8 divisors (see below), whose sum is σ = 899248. Its totient is φ = 437184.

The previous prime is 665089. The next prime is 665111. The reversal of 665103 is 301566.

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

It is not a de Polignac number, because 665103 - 2⁶ = 665039 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 665103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665113) 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, 1300 + ... + 1737.

It is an arithmetic number, because the mean of its divisors is an integer number (112406).

2⁶⁶⁵¹⁰³ is an apocalyptic number.

665103 is a deficient number, since it is larger than the sum of its proper divisors (234145).

665103 is a wasteful number, since it uses less digits than its factorization.

665103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 665103 is about 815.5384724217. The cubic root of 665103 is about 87.2896935725.

Adding to 665103 its reverse (301566), we get a palindrome (966669).

The spelling of 665103 in words is "six hundred sixty-five thousand, one hundred three".