660605272768 has 56 divisors (see below), whose sum is σ = 1499907400992. Its totient is φ = 282786023424.

The previous prime is 660605272759. The next prime is 660605272813. The reversal of 660605272768 is 867272506066.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476371 + ... + 1244242.

It is an arithmetic number, because the mean of its divisors is an integer number (26784060732).

Almost surely, 2^660605272768 is an apocalyptic number.

It is an amenable number.

660605272768 is an abundant number, since it is smaller than the sum of its proper divisors (839302128224).

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

660605272768 is a wasteful number, since it uses less digits than its factorization.

660605272768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721489 (or 1721479 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 660605272768 in words is "six hundred sixty billion, six hundred five million, two hundred seventy-two thousand, seven hundred sixty-eight".