6720723887 has 2 divisors, whose sum is σ = 6720723888. Its totient is φ = 6720723886.

The previous prime is 6720723811. The next prime is 6720723899. The reversal of 6720723887 is 7883270276.

6720723887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6720723887 - 2³⁰ = 5646982063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6720723587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360361943 + 3360361944.

It is an arithmetic number, because the mean of its divisors is an integer number (3360361944).

Almost surely, 2^6720723887 is an apocalyptic number.

6720723887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720723887 is an equidigital number, since it uses as much as digits as its factorization.

6720723887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The square root of 6720723887 is about 81980.0212673795. The cubic root of 6720723887 is about 1887.1453491648.

The spelling of 6720723887 in words is "six billion, seven hundred twenty million, seven hundred twenty-three thousand, eight hundred eighty-seven".