6720208751 has 2 divisors, whose sum is σ = 6720208752. Its totient is φ = 6720208750.

The previous prime is 6720208739. The next prime is 6720208753. The reversal of 6720208751 is 1578020276.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6720208751 - 2¹⁰ = 6720207727 is a prime.

It is a super-2 number, since 2×6720208751² = 90322411314033960002, which contains 22 as substring.

Together with 6720208753, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6720208753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3360104375 + 3360104376.

It is an arithmetic number, because the mean of its divisors is an integer number (3360104376).

Almost surely, 2^6720208751 is an apocalyptic number.

6720208751 is a deficient number, since it is larger than the sum of its proper divisors (1).

6720208751 is an equidigital number, since it uses as much as digits as its factorization.

6720208751 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 6720208751 is about 81976.8793685146. The cubic root of 6720208751 is about 1887.0971320698.

The spelling of 6720208751 in words is "six billion, seven hundred twenty million, two hundred eight thousand, seven hundred fifty-one".