6647650560000 has 1200 divisors, whose sum is σ = 25105817957220. Its totient is φ = 1751777280000.

The previous prime is 6647650559981. The next prime is 6647650560007. The reversal of 6647650560000 is 650567466.

It can be written as a sum of positive squares in 10 ways, for example, as 152737145856 + 6494913414144 = 390816^2 + 2548512^2 .

It is a tau number, because it is divible by the number of its divisors (1200).

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 (6647650560007) by changing a digit.

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 99 ways as a sum of consecutive naturals, for example, 10056959670 + ... + 10056960330.

Almost surely, 2^{6647650560000} is an apocalyptic number.

6647650560000 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 6647650560000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12552908978610).

6647650560000 is an abundant number, since it is smaller than the sum of its proper divisors (18458167397220).

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

6647650560000 is an frugal number, since it uses more digits than its factorization.

6647650560000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 6647650560000 in words is "six trillion, six hundred forty-seven billion, six hundred fifty million, five hundred sixty thousand".