6720709540 has 24 divisors (see below), whose sum is σ = 14413779072. Its totient is φ = 2631085920.

The previous prime is 6720709537. The next prime is 6720709577. The reversal of 6720709540 is 459070276.

It is a junction number, because it is equal to n+sod(n) for n = 6720709493 and 6720709502.

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, 3573906 + ... + 3575785.

It is an arithmetic number, because the mean of its divisors is an integer number (600574128).

Almost surely, 2^6720709540 is an apocalyptic number.

It is an amenable number.

6720709540 is an abundant number, since it is smaller than the sum of its proper divisors (7693069532).

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

6720709540 is a wasteful number, since it uses less digits than its factorization.

6720709540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7149747 (or 7149745 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 6720709540 is about 81979.9337643060. The cubic root of 6720709540 is about 1887.1440063088.

The spelling of 6720709540 in words is "six billion, seven hundred twenty million, seven hundred nine thousand, five hundred forty".