6720173867 has 6 divisors (see below), whose sum is σ = 7386637524. Its totient is φ = 6109248860.

The previous prime is 6720173861. The next prime is 6720173903. The reversal of 6720173867 is 7683710276.

It is a de Polignac number, because none of the positive numbers 2^k-6720173867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6720173861) 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 in 5 ways as a sum of consecutive naturals, for example, 27769193 + ... + 27769434.

It is an arithmetic number, because the mean of its divisors is an integer number (1231106254).

Almost surely, 2^6720173867 is an apocalyptic number.

6720173867 is a deficient number, since it is larger than the sum of its proper divisors (666463657).

6720173867 is a wasteful number, since it uses less digits than its factorization.

6720173867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55538649 (or 55538638 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 47.

The square root of 6720173867 is about 81976.6666009298. Note that the first 4 decimals coincide. The cubic root of 6720173867 is about 1887.0938668136.

The spelling of 6720173867 in words is "six billion, seven hundred twenty million, one hundred seventy-three thousand, eight hundred sixty-seven".