6551326720 has 208 divisors, whose sum is σ = 17211322368. Its totient is φ = 2382888960.

The previous prime is 6551326709. The next prime is 6551326741. The reversal of 6551326720 is 276231556.

It is a self number, because there is not a number n which added to its sum of digits gives 6551326720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10792657 + ... + 10793263.

Almost surely, 2^6551326720 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 6551326720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8605661184).

6551326720 is an abundant number, since it is smaller than the sum of its proper divisors (10659995648).

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

6551326720 is a wasteful number, since it uses less digits than its factorization.

6551326720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684 (or 662 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 6551326720 is about 80940.2663697124. The cubic root of 6551326720 is about 1871.1549501202.

The spelling of 6551326720 in words is "six billion, five hundred fifty-one million, three hundred twenty-six thousand, seven hundred twenty".