663814327680 has 256 divisors, whose sum is σ = 2686868006400. Its totient is φ = 151728961536.

The previous prime is 663814327651. The next prime is 663814327697. The reversal of 663814327680 is 86723418366.

663814327680 is a `hidden beast` number, since 6 + 63 + 8 + 1 + 432 + 76 + 80 = 666.

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 31 ways as a sum of consecutive naturals, for example, 2622982 + ... + 2864901.

It is an arithmetic number, because the mean of its divisors is an integer number (10495578150).

Almost surely, 2^663814327680 is an apocalyptic number.

663814327680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663814327680 is an abundant number, since it is smaller than the sum of its proper divisors (2023053678720).

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

663814327680 is a wasteful number, since it uses less digits than its factorization.

663814327680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487918 (or 5487900 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 663814327680 in words is "six hundred sixty-three billion, eight hundred fourteen million, three hundred twenty-seven thousand, six hundred eighty".