6720660755 has 8 divisors (see below), whose sum is σ = 8261495424. Its totient is φ = 5245393600.

The previous prime is 6720660679. The next prime is 6720660773. The reversal of 6720660755 is 5570660276.

6720660755 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6720660755 - 2³⁰ = 5646918931 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16391651 + ... + 16392060.

It is an arithmetic number, because the mean of its divisors is an integer number (1032686928).

Almost surely, 2^6720660755 is an apocalyptic number.

6720660755 is a deficient number, since it is larger than the sum of its proper divisors (1540834669).

6720660755 is a wasteful number, since it uses less digits than its factorization.

6720660755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32783757.

The product of its (nonzero) digits is 529200, while the sum is 44.

The square root of 6720660755 is about 81979.6362214422. The cubic root of 6720660755 is about 1887.1394400973.

The spelling of 6720660755 in words is "six billion, seven hundred twenty million, six hundred sixty thousand, seven hundred fifty-five".