665304663 has 8 divisors (see below), whose sum is σ = 908708976. Its totient is φ = 432718400.

The previous prime is 665304649. The next prime is 665304691. The reversal of 665304663 is 366403566.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 665304663 - 2¹⁴ = 665288279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665304623) 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, 2704368 + ... + 2704613.

It is an arithmetic number, because the mean of its divisors is an integer number (113588622).

Almost surely, 2^665304663 is an apocalyptic number.

665304663 is a deficient number, since it is larger than the sum of its proper divisors (243404313).

665304663 is a wasteful number, since it uses less digits than its factorization.

665304663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5409025.

The product of its (nonzero) digits is 233280, while the sum is 39.

The square root of 665304663 is about 25793.5004022331. The cubic root of 665304663 is about 872.9851492431.

The spelling of 665304663 in words is "six hundred sixty-five million, three hundred four thousand, six hundred sixty-three".