663847488 has 140 divisors (see below), whose sum is σ = 2021621052. Its totient is φ = 215239680.

The previous prime is 663847469. The next prime is 663847493. The reversal of 663847488 is 884748366.

663847488 is a `hidden beast` number, since 66 + 38 + 474 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 375119424 + 288728064 = 19368^2 + 16992^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 190078 + ... + 193538.

Almost surely, 2^663847488 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 663847488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010810526).

663847488 is an abundant number, since it is smaller than the sum of its proper divisors (1357773564).

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

663847488 is a wasteful number, since it uses less digits than its factorization.

663847488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522 (or 3503 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The square root of 663847488 is about 25765.2379767779. The cubic root of 663847488 is about 872.3473351882.

The spelling of 663847488 in words is "six hundred sixty-three million, eight hundred forty-seven thousand, four hundred eighty-eight".