6778587506651 has 2 divisors, whose sum is σ = 6778587506652. Its totient is φ = 6778587506650.

The previous prime is 6778587506573. The next prime is 6778587506659. The reversal of 6778587506651 is 1566057858776.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6778587506651 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6778587506659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389293753325 + 3389293753326.

It is an arithmetic number, because the mean of its divisors is an integer number (3389293753326).

Almost surely, 2^{6778587506651} is an apocalyptic number.

6778587506651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778587506651 is an equidigital number, since it uses as much as digits as its factorization.

6778587506651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704000, while the sum is 71.

The spelling of 6778587506651 in words is "six trillion, seven hundred seventy-eight billion, five hundred eighty-seven million, five hundred six thousand, six hundred fifty-one".