6720000005 has 4 divisors (see below), whose sum is σ = 8064000012. Its totient is φ = 5376000000.

The previous prime is 6719999959. The next prime is 6720000011. The reversal of 6720000005 is 5000000276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3363304036 + 3356695969 = 57994^2 + 57937^2 .

It is not a de Polignac number, because 6720000005 - 2⁶ = 6719999941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671999996 + ... + 672000005.

It is an arithmetic number, because the mean of its divisors is an integer number (2016000003).

Almost surely, 2^6720000005 is an apocalyptic number.

It is an amenable number.

6720000005 is a deficient number, since it is larger than the sum of its proper divisors (1344000007).

6720000005 is a wasteful number, since it uses less digits than its factorization.

6720000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344000006.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 6720000005 is about 81975.6061581737. The cubic root of 6720000005 is about 1887.0775925946.

The spelling of 6720000005 in words is "six billion, seven hundred twenty million, five", and thus it is an aban number.