6815677669 has 2 divisors, whose sum is σ = 6815677670. Its totient is φ = 6815677668.

The previous prime is 6815677613. The next prime is 6815677691. The reversal of 6815677669 is 9667765186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4410952225 + 2404725444 = 66415^2 + 49038^2 .

It is a cyclic number.

It is not a de Polignac number, because 6815677669 - 2⁷ = 6815677541 is a prime.

It is a super-2 number, since 2×6815677669² = 92906924175410547122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6815677069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3407838834 + 3407838835.

It is an arithmetic number, because the mean of its divisors is an integer number (3407838835).

Almost surely, 2^6815677669 is an apocalyptic number.

It is an amenable number.

6815677669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6815677669 is an equidigital number, since it uses as much as digits as its factorization.

6815677669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 61.

The square root of 6815677669 is about 82557.1176156242. The cubic root of 6815677669 is about 1895.9913331283.

The spelling of 6815677669 in words is "six billion, eight hundred fifteen million, six hundred seventy-seven thousand, six hundred sixty-nine".