6699999673 has 2 divisors, whose sum is σ = 6699999674. Its totient is φ = 6699999672.

The previous prime is 6699999653. The next prime is 6699999749. The reversal of 6699999673 is 3769999966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6123375504 + 576624169 = 78252^2 + 24013^2 .

It is a cyclic number.

It is not a de Polignac number, because 6699999673 - 2²¹ = 6697902521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6699999596 and 6699999605.

It is not a weakly prime, because it can be changed into another prime (6699999623) 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, 3349999836 + 3349999837.

It is an arithmetic number, because the mean of its divisors is an integer number (3349999837).

Almost surely, 2^6699999673 is an apocalyptic number.

It is an amenable number.

6699999673 is a deficient number, since it is larger than the sum of its proper divisors (1).

6699999673 is an equidigital number, since it uses as much as digits as its factorization.

6699999673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 267846264, while the sum is 73.

The square root of 6699999673 is about 81853.5257212541. The cubic root of 6699999673 is about 1885.2036003513.

The spelling of 6699999673 in words is "six billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred seventy-three".