6720538718 has 16 divisors (see below), whose sum is σ = 10224703440. Its totient is φ = 3312482496.

The previous prime is 6720538691. The next prime is 6720538723. The reversal of 6720538718 is 8178350276.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31568 + ... + 120156.

It is an arithmetic number, because the mean of its divisors is an integer number (639043965).

Almost surely, 2^6720538718 is an apocalyptic number.

6720538718 is a deficient number, since it is larger than the sum of its proper divisors (3504164722).

6720538718 is a wasteful number, since it uses less digits than its factorization.

6720538718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89131.

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 6720538718 is about 81978.8919051728. The cubic root of 6720538718 is about 1887.1280174987.

The spelling of 6720538718 in words is "six billion, seven hundred twenty million, five hundred thirty-eight thousand, seven hundred eighteen".