1003165663 has 4 divisors (see below), whose sum is σ = 1004406480. Its totient is φ = 1001924848.

The previous prime is 1003165661. The next prime is 1003165703. The reversal of 1003165663 is 3665613001.

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 1003165663 - 2¹ = 1003165661 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003165661) 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, 619195 + ... + 620812.

It is an arithmetic number, because the mean of its divisors is an integer number (251101620).

Almost surely, 2^1003165663 is an apocalyptic number.

1003165663 is a deficient number, since it is larger than the sum of its proper divisors (1240817).

1003165663 is an equidigital number, since it uses as much as digits as its factorization.

1003165663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240816.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1003165663 is about 31672.7905780340. The cubic root of 1003165663 is about 1001.0541094628.

Adding to 1003165663 its reverse (3665613001), we get a palindrome (4668778664).

The spelling of 1003165663 in words is "one billion, three million, one hundred sixty-five thousand, six hundred sixty-three".