663610323 has 4 divisors (see below), whose sum is σ = 884813768. Its totient is φ = 442406880.

The previous prime is 663610319. The next prime is 663610331. The reversal of 663610323 is 323016366.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 663610323 - 2² = 663610319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663610333) 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, 110601718 + ... + 110601723.

It is an arithmetic number, because the mean of its divisors is an integer number (221203442).

Almost surely, 2^663610323 is an apocalyptic number.

663610323 is a deficient number, since it is larger than the sum of its proper divisors (221203445).

663610323 is a wasteful number, since it uses less digits than its factorization.

663610323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221203444.

The product of its (nonzero) digits is 11664, while the sum is 30.

The square root of 663610323 is about 25760.6351435674. The cubic root of 663610323 is about 872.2434383836.

Adding to 663610323 its reverse (323016366), we get a palindrome (986626689).

The spelling of 663610323 in words is "six hundred sixty-three million, six hundred ten thousand, three hundred twenty-three".