663180991200 has 1728 divisors, whose sum is σ = 3009359388672. Its totient is φ = 133672550400.

The previous prime is 663180991171. The next prime is 663180991309. The reversal of 663180991200 is 2199081366.

It is a happy number.

663180991200 is a `hidden beast` number, since 6 + 631 + 8 + 0 + 9 + 9 + 1 + 2 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2092053442 + ... + 2092053758.

It is an arithmetic number, because the mean of its divisors is an integer number (1741527424).

Almost surely, 2^663180991200 is an apocalyptic number.

663180991200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663180991200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504679694336).

663180991200 is an abundant number, since it is smaller than the sum of its proper divisors (2346178397472).

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

663180991200 is a wasteful number, since it uses less digits than its factorization.

663180991200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 663180991200 in words is "six hundred sixty-three billion, one hundred eighty million, nine hundred ninety-one thousand, two hundred".