6728447477 has 2 divisors, whose sum is σ = 6728447478. Its totient is φ = 6728447476.

The previous prime is 6728447471. The next prime is 6728447507. The reversal of 6728447477 is 7747448276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6170259601 + 558187876 = 78551^2 + 23626^2 .

It is a cyclic number.

It is not a de Polignac number, because 6728447477 - 2⁶ = 6728447413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6728447471) 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, 3364223738 + 3364223739.

It is an arithmetic number, because the mean of its divisors is an integer number (3364223739).

Almost surely, 2^6728447477 is an apocalyptic number.

It is an amenable number.

6728447477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6728447477 is an equidigital number, since it uses as much as digits as its factorization.

6728447477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14751744, while the sum is 56.

The square root of 6728447477 is about 82027.1142793650. The cubic root of 6728447477 is about 1887.8679874428.

The spelling of 6728447477 in words is "six billion, seven hundred twenty-eight million, four hundred forty-seven thousand, four hundred seventy-seven".