663049728 has 240 divisors, whose sum is σ = 2124435456. Its totient is φ = 197406720.

The previous prime is 663049693. The next prime is 663049753. The reversal of 663049728 is 827940366.

663049728 is a `hidden beast` number, since 6 + 630 + 4 + 9 + 7 + 2 + 8 = 666.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 5220801 + ... + 5220927.

Almost surely, 2^663049728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663049728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1062217728).

663049728 is an abundant number, since it is smaller than the sum of its proper divisors (1461385728).

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

663049728 is a wasteful number, since it uses less digits than its factorization.

663049728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 663049728 is about 25749.7519988057. The cubic root of 663049728 is about 871.9977555142.

The spelling of 663049728 in words is "six hundred sixty-three million, forty-nine thousand, seven hundred twenty-eight".