6721758120 has 384 divisors, whose sum is σ = 25965515520. Its totient is φ = 1361817600.

The previous prime is 6721758101. The next prime is 6721758137. The reversal of 6721758120 is 218571276.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4166434 + ... + 4168046.

It is an arithmetic number, because the mean of its divisors is an integer number (67618530).

Almost surely, 2^6721758120 is an apocalyptic number.

6721758120 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 6721758120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12982757760).

6721758120 is an abundant number, since it is smaller than the sum of its proper divisors (19243757400).

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

6721758120 is a wasteful number, since it uses less digits than its factorization.

6721758120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 6721758120 is about 81986.3288603655. The cubic root of 6721758120 is about 1887.2421466686.

The spelling of 6721758120 in words is "six billion, seven hundred twenty-one million, seven hundred fifty-eight thousand, one hundred twenty".