6778597447 has 2 divisors, whose sum is σ = 6778597448. Its totient is φ = 6778597446.

The previous prime is 6778597387. The next prime is 6778597457. The reversal of 6778597447 is 7447958776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6778597447 - 2¹¹ = 6778595399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778597457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389298723 + 3389298724.

It is an arithmetic number, because the mean of its divisors is an integer number (3389298724).

Almost surely, 2^6778597447 is an apocalyptic number.

6778597447 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778597447 is an equidigital number, since it uses as much as digits as its factorization.

6778597447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82978560, while the sum is 64.

The square root of 6778597447 is about 82332.2381998692. The cubic root of 6778597447 is about 1892.5467423875.

The spelling of 6778597447 in words is "six billion, seven hundred seventy-eight million, five hundred ninety-seven thousand, four hundred forty-seven".