6868666969 has 2 divisors, whose sum is σ = 6868666970. Its totient is φ = 6868666968.

The previous prime is 6868666873. The next prime is 6868667009. The reversal of 6868666969 is 9696668686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6306265744 + 562401225 = 79412^2 + 23715^2 .

It is a cyclic number.

It is not a de Polignac number, because 6868666969 - 2⁷ = 6868666841 is a prime.

It is a super-2 number, since 2×6868666969² = 94357171862063293922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6868666898 and 6868666907.

It is not a weakly prime, because it can be changed into another prime (6868666769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3434333484 + 3434333485.

It is an arithmetic number, because the mean of its divisors is an integer number (3434333485).

Almost surely, 2^6868666969 is an apocalyptic number.

It is an amenable number.

6868666969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6868666969 is an equidigital number, since it uses as much as digits as its factorization.

6868666969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241864704, while the sum is 70.

The square root of 6868666969 is about 82877.4213462267. The cubic root of 6868666969 is about 1900.8921912336.

The spelling of 6868666969 in words is "six billion, eight hundred sixty-eight million, six hundred sixty-six thousand, nine hundred sixty-nine".