9999886667 has 2 divisors, whose sum is σ = 9999886668. Its totient is φ = 9999886666.

The previous prime is 9999886657. The next prime is 9999886669. The reversal of 9999886667 is 7666889999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9999886667 - 2⁴ = 9999886651 is a prime.

Together with 9999886669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9999886669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999943333 + 4999943334.

It is an arithmetic number, because the mean of its divisors is an integer number (4999943334).

Almost surely, 2^9999886667 is an apocalyptic number.

9999886667 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999886667 is an equidigital number, since it uses as much as digits as its factorization.

9999886667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 634894848, while the sum is 77.

The square root of 9999886667 is about 99999.4333333944. The cubic root of 9999886667 is about 2154.4265510496.

The spelling of 9999886667 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-six thousand, six hundred sixty-seven".