6787777879 has 2 divisors, whose sum is σ = 6787777880. Its totient is φ = 6787777878.

The previous prime is 6787777861. The next prime is 6787777883. The reversal of 6787777879 is 9787777876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6787777879 - 2¹⁷ = 6787646807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6787777889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3393888939 + 3393888940.

It is an arithmetic number, because the mean of its divisors is an integer number (3393888940).

Almost surely, 2^6787777879 is an apocalyptic number.

6787777879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6787777879 is an equidigital number, since it uses as much as digits as its factorization.

6787777879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 406594944, while the sum is 73.

The square root of 6787777879 is about 82387.9716888333. The cubic root of 6787777879 is about 1893.4007321779.

The spelling of 6787777879 in words is "six billion, seven hundred eighty-seven million, seven hundred seventy-seven thousand, eight hundred seventy-nine".