663188878387872 has 288 divisors, whose sum is σ = 1999056199271040. Its totient is φ = 207967668480000.

The previous prime is 663188878387823. The next prime is 663188878387921. The reversal of 663188878387872 is 278783878881366.

663188878387872 is a `hidden beast` number, since 6 + 6 + 3 + 1 + 8 + 88 + 78 + 387 + 87 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (663188878387823) and next prime (663188878387921).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2363823922 + ... + 2364104462.

It is an arithmetic number, because the mean of its divisors is an integer number (6941167358580).

Almost surely, 2^{663188878387872} 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 663188878387872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (999528099635520).

663188878387872 is an abundant number, since it is smaller than the sum of its proper divisors (1335867320883168).

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

663188878387872 is a wasteful number, since it uses less digits than its factorization.

663188878387872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283588 (or 283577 counting only the distinct ones).

The product of its digits is 58265174016, while the sum is 90.

The spelling of 663188878387872 in words is "six hundred sixty-three trillion, one hundred eighty-eight billion, eight hundred seventy-eight million, three hundred eighty-seven thousand, eight hundred seventy-two".