660673737280 has 56 divisors (see below), whose sum is σ = 1573306334712. Its totient is φ = 264256561152.

The previous prime is 660673737257. The next prime is 660673737341. The reversal of 660673737280 is 82737376066.

It can be written as a sum of positive squares in 4 ways, for example, as 111545312256 + 549128425024 = 333984^2 + 741032^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9062254 + ... + 9134866.

It is an arithmetic number, because the mean of its divisors is an integer number (28094755977).

Almost surely, 2^660673737280 is an apocalyptic number.

It is an amenable number.

660673737280 is an abundant number, since it is smaller than the sum of its proper divisors (912632597432).

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

660673737280 is a wasteful number, since it uses less digits than its factorization.

660673737280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101063 (or 101053 counting only the distinct ones).

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 660673737280 in words is "six hundred sixty billion, six hundred seventy-three million, seven hundred thirty-seven thousand, two hundred eighty".