6818676521 has 2 divisors, whose sum is σ = 6818676522. Its totient is φ = 6818676520.

The previous prime is 6818676463. The next prime is 6818676541. The reversal of 6818676521 is 1256768186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6306106921 + 512569600 = 79411^2 + 22640^2 .

It is a cyclic number.

It is not a de Polignac number, because 6818676521 - 2¹⁴ = 6818660137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6818676521.

It is not a weakly prime, because it can be changed into another prime (6818676541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3409338260 + 3409338261.

It is an arithmetic number, because the mean of its divisors is an integer number (3409338261).

Almost surely, 2^6818676521 is an apocalyptic number.

It is an amenable number.

6818676521 is a deficient number, since it is larger than the sum of its proper divisors (1).

6818676521 is an equidigital number, since it uses as much as digits as its factorization.

6818676521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 50.

The square root of 6818676521 is about 82575.2779044673. The cubic root of 6818676521 is about 1896.2693668019.

The spelling of 6818676521 in words is "six billion, eight hundred eighteen million, six hundred seventy-six thousand, five hundred twenty-one".