6651039544320 has 352 divisors, whose sum is σ = 22469905244160. Its totient is φ = 1676475924480.

The previous prime is 6651039544273. The next prime is 6651039544339. The reversal of 6651039544320 is 234459301566.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 6651039544320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20312461 + ... + 20637299.

It is an arithmetic number, because the mean of its divisors is an integer number (63834958080).

Almost surely, 2^{6651039544320} is an apocalyptic number.

6651039544320 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 6651039544320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11234952622080).

6651039544320 is an abundant number, since it is smaller than the sum of its proper divisors (15818865699840).

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

6651039544320 is a wasteful number, since it uses less digits than its factorization.

6651039544320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324941 (or 324923 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 6651039544320 in words is "six trillion, six hundred fifty-one billion, thirty-nine million, five hundred forty-four thousand, three hundred twenty".