663043523 has 8 divisors (see below), whose sum is σ = 680563200. Its totient is φ = 645666120.

The previous prime is 663043489. The next prime is 663043561. The reversal of 663043523 is 325340366.

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 663043523 - 2¹⁴ = 663027139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663043523.

It is not an unprimeable number, because it can be changed into a prime (663043573) 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, 26093 + ... + 44798.

It is an arithmetic number, because the mean of its divisors is an integer number (85070400).

Almost surely, 2^663043523 is an apocalyptic number.

663043523 is a deficient number, since it is larger than the sum of its proper divisors (17519677).

663043523 is a wasteful number, since it uses less digits than its factorization.

663043523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71137.

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 663043523 is about 25749.6315119265. The cubic root of 663043523 is about 871.9950353749.

Adding to 663043523 its reverse (325340366), we get a palindrome (988383889).

The spelling of 663043523 in words is "six hundred sixty-three million, forty-three thousand, five hundred twenty-three".