663888450 has 24 divisors (see below), whose sum is σ = 1646443728. Its totient is φ = 177036880.

The previous prime is 663888439. The next prime is 663888479. The reversal of 663888450 is 54888366.

It is a self number, because there is not a number n which added to its sum of digits gives 663888450.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2212812 + ... + 2213111.

It is an arithmetic number, because the mean of its divisors is an integer number (68601822).

Almost surely, 2^663888450 is an apocalyptic number.

663888450 is an abundant number, since it is smaller than the sum of its proper divisors (982555278).

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

663888450 is a wasteful number, since it uses less digits than its factorization.

663888450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425938 (or 4425933 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 663888450 is about 25766.0328727571. The cubic root of 663888450 is about 872.3652772393.

The spelling of 663888450 in words is "six hundred sixty-three million, eight hundred eighty-eight thousand, four hundred fifty".