663384393504 has 288 divisors, whose sum is σ = 2238617437056. Its totient is φ = 189303920640.

The previous prime is 663384393493. The next prime is 663384393517. The reversal of 663384393504 is 405393483366.

It is a happy number.

663384393504 is a `hidden beast` number, since 6 + 6 + 3 + 3 + 8 + 43 + 93 + 504 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46641114 + ... + 46655334.

It is an arithmetic number, because the mean of its divisors is an integer number (7772977212).

Almost surely, 2^663384393504 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 663384393504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119308718528).

663384393504 is an abundant number, since it is smaller than the sum of its proper divisors (1575233043552).

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

663384393504 is a wasteful number, since it uses less digits than its factorization.

663384393504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15110 (or 15090 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 54.

The spelling of 663384393504 in words is "six hundred sixty-three billion, three hundred eighty-four million, three hundred ninety-three thousand, five hundred four".