6777423791 has 2 divisors, whose sum is σ = 6777423792. Its totient is φ = 6777423790.

The previous prime is 6777423787. The next prime is 6777423803. The reversal of 6777423791 is 1973247776.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6777423791 - 2² = 6777423787 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6777423761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3388711895 + 3388711896.

It is an arithmetic number, because the mean of its divisors is an integer number (3388711896).

Almost surely, 2^6777423791 is an apocalyptic number.

6777423791 is a deficient number, since it is larger than the sum of its proper divisors (1).

6777423791 is an equidigital number, since it uses as much as digits as its factorization.

6777423791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3111696, while the sum is 53.

The square root of 6777423791 is about 82325.1103309312. The cubic root of 6777423791 is about 1892.4375100051.

The spelling of 6777423791 in words is "six billion, seven hundred seventy-seven million, four hundred twenty-three thousand, seven hundred ninety-one".