660070438560 has 720 divisors, whose sum is σ = 2632348502784. Its totient is φ = 155402717184.

The previous prime is 660070438519. The next prime is 660070438561. The reversal of 660070438560 is 65834070066.

660070438560 is a `hidden beast` number, since 6 + 600 + 7 + 0 + 4 + 38 + 5 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (660070438561) 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 119 ways as a sum of consecutive naturals, for example, 50368969 + ... + 50382071.

Almost surely, 2^660070438560 is an apocalyptic number.

660070438560 is a gapful number since it is divisible by the number (60) 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 660070438560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316174251392).

660070438560 is an abundant number, since it is smaller than the sum of its proper divisors (1972278064224).

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

660070438560 is a wasteful number, since it uses less digits than its factorization.

660070438560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13179 (or 13149 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 660070438560 in words is "six hundred sixty billion, seventy million, four hundred thirty-eight thousand, five hundred sixty".