506603663 has 4 divisors (see below), whose sum is σ = 506670600. Its totient is φ = 506536728.

The previous prime is 506603633. The next prime is 506603687. The reversal of 506603663 is 366306605.

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

It is a cyclic number.

It is not a de Polignac number, because 506603663 - 2⁶ = 506603599 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 (506603633) 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, 20420 + ... + 37817.

It is an arithmetic number, because the mean of its divisors is an integer number (126667650).

Almost surely, 2^506603663 is an apocalyptic number.

506603663 is a deficient number, since it is larger than the sum of its proper divisors (66937).

506603663 is an equidigital number, since it uses as much as digits as its factorization.

506603663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66936.

The product of its (nonzero) digits is 58320, while the sum is 35.

The square root of 506603663 is about 22507.8578056642. The cubic root of 506603663 is about 797.1794752996.

The spelling of 506603663 in words is "five hundred six million, six hundred three thousand, six hundred sixty-three".