660279320064 has 960 divisors, whose sum is σ = 2517353879040. Its totient is φ = 168051179520.

The previous prime is 660279320027. The next prime is 660279320159. The reversal of 660279320064 is 460023972066.

660279320064 is a `hidden beast` number, since 6 + 602 + 7 + 9 + 32 + 0 + 0 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 328332819 + ... + 328334829.

It is an arithmetic number, because the mean of its divisors is an integer number (2622243624).

Almost surely, 2^660279320064 is an apocalyptic number.

660279320064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660279320064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1258676939520).

660279320064 is an abundant number, since it is smaller than the sum of its proper divisors (1857074558976).

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

660279320064 is a wasteful number, since it uses less digits than its factorization.

660279320064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093 (or 2065 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 660279320064 in words is "six hundred sixty billion, two hundred seventy-nine million, three hundred twenty thousand, sixty-four".