663133173505420 has 24 divisors (see below), whose sum is σ = 1392590207224944. Its totient is φ = 265251261237696.

The previous prime is 663133173505399. The next prime is 663133173505463. The reversal of 663133173505420 is 24505371331366.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122801062 + ... + 128087341.

It is an arithmetic number, because the mean of its divisors is an integer number (58024591967706).

Almost surely, 2^{663133173505420} is an apocalyptic number.

It is an amenable number.

663133173505420 is an abundant number, since it is smaller than the sum of its proper divisors (729457033719524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663133173505420 is a wasteful number, since it uses less digits than its factorization.

663133173505420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251020569 (or 251020567 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 49.

The spelling of 663133173505420 in words is "six hundred sixty-three trillion, one hundred thirty-three billion, one hundred seventy-three million, five hundred five thousand, four hundred twenty".