663245623 has 6 divisors (see below), whose sum is σ = 677659736. Its totient is φ = 649131852.

The previous prime is 663245587. The next prime is 663245659. The reversal of 663245623 is 326542366.

663245623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (663245587) and next prime (663245659).

It is not a de Polignac number, because 663245623 - 2²⁵ = 629691191 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 (663245423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147915 + ... + 152332.

Almost surely, 2^663245623 is an apocalyptic number.

663245623 is a deficient number, since it is larger than the sum of its proper divisors (14414113).

663245623 is an equidigital number, since it uses as much as digits as its factorization.

663245623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300341 (or 300294 counting only the distinct ones).

The product of its digits is 155520, while the sum is 37.

The square root of 663245623 is about 25753.5555409345. Note that the first 4 decimals coincide. The cubic root of 663245623 is about 872.0836229704.

Adding to 663245623 its reverse (326542366), we get a palindrome (989787989).

The spelling of 663245623 in words is "six hundred sixty-three million, two hundred forty-five thousand, six hundred twenty-three".