6399617767 has 2 divisors, whose sum is σ = 6399617768. Its totient is φ = 6399617766.

The previous prime is 6399617747. The next prime is 6399617771. The reversal of 6399617767 is 7677169936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6399617767 - 2¹⁹ = 6399093479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6399617737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199808883 + 3199808884.

It is an arithmetic number, because the mean of its divisors is an integer number (3199808884).

Almost surely, 2^6399617767 is an apocalyptic number.

6399617767 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399617767 is an equidigital number, since it uses as much as digits as its factorization.

6399617767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18003384, while the sum is 61.

The square root of 6399617767 is about 79997.6110080795. The cubic root of 6399617767 is about 1856.5985708671.

The spelling of 6399617767 in words is "six billion, three hundred ninety-nine million, six hundred seventeen thousand, seven hundred sixty-seven".