660474816768 has 432 divisors, whose sum is σ = 2095785933696. Its totient is φ = 198810501120.

The previous prime is 660474816739. The next prime is 660474816769. The reversal of 660474816768 is 867618474066.

660474816768 is a `hidden beast` number, since 6 + 604 + 7 + 4 + 8 + 16 + 7 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (660474816769) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 291341971 + ... + 291344237.

It is an arithmetic number, because the mean of its divisors is an integer number (4851356328).

Almost surely, 2^660474816768 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 660474816768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047892966848).

660474816768 is an abundant number, since it is smaller than the sum of its proper divisors (1435311116928).

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

660474816768 is a wasteful number, since it uses less digits than its factorization.

660474816768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510 (or 2493 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 660474816768 in words is "six hundred sixty billion, four hundred seventy-four million, eight hundred sixteen thousand, seven hundred sixty-eight".