665241103 has 4 divisors (see below), whose sum is σ = 674610768. Its totient is φ = 655871440.

The previous prime is 665241079. The next prime is 665241163. The reversal of 665241103 is 301142566.

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 665241103 - 2⁹ = 665240591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665241163) 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, 4684726 + ... + 4684867.

It is an arithmetic number, because the mean of its divisors is an integer number (168652692).

Almost surely, 2^665241103 is an apocalyptic number.

665241103 is a deficient number, since it is larger than the sum of its proper divisors (9369665).

665241103 is an equidigital number, since it uses as much as digits as its factorization.

665241103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9369664.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 665241103 is about 25792.2682794670. The cubic root of 665241103 is about 872.9573480936.

Adding to 665241103 its reverse (301142566), we get a palindrome (966383669).

The spelling of 665241103 in words is "six hundred sixty-five million, two hundred forty-one thousand, one hundred three".