660111265000 has 360 divisors, whose sum is σ = 1749407252670. Its totient is φ = 233259840000.

The previous prime is 660111264997. The next prime is 660111265019. The reversal of 660111265000 is 562111066.

It can be written as a sum of positive squares in 15 ways, for example, as 33996721924 + 626114543076 = 184382^2 + 791274^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 660111265000.

It is an unprimeable number.

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 89 ways as a sum of consecutive naturals, for example, 828244602 + ... + 828245398.

Almost surely, 2^660111265000 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 660111265000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874703626335).

660111265000 is an abundant number, since it is smaller than the sum of its proper divisors (1089295987670).

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

660111265000 is a wasteful number, since it uses less digits than its factorization.

660111265000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 660111265000 its reverse (562111066), we get a palindrome (660673376066).

The spelling of 660111265000 in words is "six hundred sixty billion, one hundred eleven million, two hundred sixty-five thousand".