665144103 has 16 divisors (see below), whose sum is σ = 963537120. Its totient is φ = 405694464.

The previous prime is 665144101. The next prime is 665144143. The reversal of 665144103 is 301441566.

It is not a de Polignac number, because 665144103 - 2¹ = 665144101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665144101) 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, 71058 + ... + 79871.

It is an arithmetic number, because the mean of its divisors is an integer number (60221070).

Almost surely, 2^665144103 is an apocalyptic number.

665144103 is a deficient number, since it is larger than the sum of its proper divisors (298393017).

665144103 is a wasteful number, since it uses less digits than its factorization.

665144103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151058.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 665144103 is about 25790.3878024352. The cubic root of 665144103 is about 872.9149168716.

Adding to 665144103 its reverse (301441566), we get a palindrome (966585669).

The spelling of 665144103 in words is "six hundred sixty-five million, one hundred forty-four thousand, one hundred three".