665550660103 has 16 divisors (see below), whose sum is σ = 765608212800. Its totient is φ = 566739104256.

The previous prime is 665550660101. The next prime is 665550660119. The reversal of 665550660103 is 301066055566.

665550660103 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 665550660103 - 2¹ = 665550660101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665550660103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665550660101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6602223 + ... + 6702271.

It is an arithmetic number, because the mean of its divisors is an integer number (47850513300).

Almost surely, 2^665550660103 is an apocalyptic number.

665550660103 is a deficient number, since it is larger than the sum of its proper divisors (100057552697).

665550660103 is a wasteful number, since it uses less digits than its factorization.

665550660103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106266.

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 665550660103 in words is "six hundred sixty-five billion, five hundred fifty million, six hundred sixty thousand, one hundred three".