663660268503 has 8 divisors (see below), whose sum is σ = 885074386416. Its totient is φ = 442343164800.

The previous prime is 663660268487. The next prime is 663660268511. The reversal of 663660268503 is 305862066366.

It is a happy number.

663660268503 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 663660268503 - 2⁴ = 663660268487 is a prime.

It is a super-2 number, since 2×663660268503² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663660268603) 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, 24237588 + ... + 24264953.

It is an arithmetic number, because the mean of its divisors is an integer number (110634298302).

Almost surely, 2^663660268503 is an apocalyptic number.

663660268503 is a deficient number, since it is larger than the sum of its proper divisors (221414117913).

663660268503 is a wasteful number, since it uses less digits than its factorization.

663660268503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48507105.

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 663660268503 in words is "six hundred sixty-three billion, six hundred sixty million, two hundred sixty-eight thousand, five hundred three".