663893744 has 40 divisors (see below), whose sum is σ = 1376228880. Its totient is φ = 309312000.

The previous prime is 663893663. The next prime is 663893749. The reversal of 663893744 is 447398366.

663893744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 663893692 and 663893701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663893749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644 + ... + 36444.

It is an arithmetic number, because the mean of its divisors is an integer number (34405722).

Almost surely, 2^663893744 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 663893744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688114440).

663893744 is an abundant number, since it is smaller than the sum of its proper divisors (712335136).

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

663893744 is a wasteful number, since it uses less digits than its factorization.

663893744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35889 (or 35883 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 50.

The square root of 663893744 is about 25766.1356047041. The cubic root of 663893744 is about 872.3675960473.

The spelling of 663893744 in words is "six hundred sixty-three million, eight hundred ninety-three thousand, seven hundred forty-four".