6999886669 has 2 divisors, whose sum is σ = 6999886670. Its totient is φ = 6999886668.

The previous prime is 6999886661. The next prime is 6999886711. The reversal of 6999886669 is 9666889996.

6999886669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4551121444 + 2448765225 = 67462^2 + 49485^2 .

It is a cyclic number.

It is not a de Polignac number, because 6999886669 - 2³ = 6999886661 is a prime.

It is a super-2 number, since 2×6999886669² = 97996826757687831122, which contains 22 as substring.

6999886669 is a strobogrammatic number because it is the same when read upside-down.

It is a junction number, because it is equal to n+sod(n) for n = 6999886595 and 6999886604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6999886661) 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, 3499943334 + 3499943335.

It is an arithmetic number, because the mean of its divisors is an integer number (3499943335).

Almost surely, 2^6999886669 is an apocalyptic number.

It is an amenable number.

6999886669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6999886669 is an equidigital number, since it uses as much as digits as its factorization.

6999886669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544195584, while the sum is 76.

The square root of 6999886669 is about 83665.3253683986. The cubic root of 6999886669 is about 1912.9208591736.

The spelling of 6999886669 in words is "six billion, nine hundred ninety-nine million, eight hundred eighty-six thousand, six hundred sixty-nine".