663560423 has 4 divisors (see below), whose sum is σ = 663721488. Its totient is φ = 663399360.

The previous prime is 663560377. The next prime is 663560431. The reversal of 663560423 is 324065366.

663560423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663560423 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 (63560423) 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, 74186 + ... + 82647.

It is an arithmetic number, because the mean of its divisors is an integer number (165930372).

Almost surely, 2^663560423 is an apocalyptic number.

663560423 is a deficient number, since it is larger than the sum of its proper divisors (161065).

663560423 is a wasteful number, since it uses less digits than its factorization.

663560423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161064.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 663560423 is about 25759.6665933393. Note that the first 3 decimals coincide. The cubic root of 663560423 is about 872.2215751319.

The spelling of 663560423 in words is "six hundred sixty-three million, five hundred sixty thousand, four hundred twenty-three".