663886122050 has 54 divisors (see below), whose sum is σ = 1256068063809. Its totient is φ = 261062822400.

The previous prime is 663886122049. The next prime is 663886122089. The reversal of 663886122050 is 50221688366.

It can be written as a sum of positive squares in 14 ways, for example, as 317952760129 + 345933361921 = 563873^2 + 588161^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=576145.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663886121986 and 663886122004.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 351447506 + ... + 351449394.

Almost surely, 2^663886122050 is an apocalyptic number.

663886122050 is a deficient number, since it is larger than the sum of its proper divisors (592181941759).

663886122050 is an frugal number, since it uses more digits than its factorization.

663886122050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 663886122050 in words is "six hundred sixty-three billion, eight hundred eighty-six million, one hundred twenty-two thousand, fifty".