6681089489 has 2 divisors, whose sum is σ = 6681089490. Its totient is φ = 6681089488.

The previous prime is 6681089479. The next prime is 6681089497. The reversal of 6681089489 is 9849801866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6205500625 + 475588864 = 78775^2 + 21808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6681089489 is a prime.

It is a super-2 number, since 2×6681089489² = 89273913520052562242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6681089419) 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, 3340544744 + 3340544745.

It is an arithmetic number, because the mean of its divisors is an integer number (3340544745).

Almost surely, 2^6681089489 is an apocalyptic number.

It is an amenable number.

6681089489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681089489 is an equidigital number, since it uses as much as digits as its factorization.

6681089489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 59.

The square root of 6681089489 is about 81737.9317636555. The cubic root of 6681089489 is about 1883.4283197209.

The spelling of 6681089489 in words is "six billion, six hundred eighty-one million, eighty-nine thousand, four hundred eighty-nine".