6778587506573 has 2 divisors, whose sum is σ = 6778587506574. Its totient is φ = 6778587506572.

The previous prime is 6778587506549. The next prime is 6778587506651. The reversal of 6778587506573 is 3756057858776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6632592445924 + 145995060649 = 2575382^2 + 382093^2 .

It is a cyclic number.

It is not a de Polignac number, because 6778587506573 - 2¹⁰ = 6778587505549 is a prime.

It is a super-2 number, since 2×6778587506573² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6778587506573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778587506473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389293753286 + 3389293753287.

It is an arithmetic number, because the mean of its divisors is an integer number (3389293753287).

Almost surely, 2^{6778587506573} is an apocalyptic number.

It is an amenable number.

6778587506573 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778587506573 is an equidigital number, since it uses as much as digits as its factorization.

6778587506573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2074464000, while the sum is 74.

The spelling of 6778587506573 in words is "six trillion, seven hundred seventy-eight billion, five hundred eighty-seven million, five hundred six thousand, five hundred seventy-three".