6677778889 has 2 divisors, whose sum is σ = 6677778890. Its totient is φ = 6677778888.

The previous prime is 6677778881. The next prime is 6677778911. The reversal of 6677778889 is 9888777766.

6677778889 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., 5156388864 + 1521390025 = 71808^2 + 39005^2 .

It is a cyclic number.

It is not a de Polignac number, because 6677778889 - 2³ = 6677778881 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (6677778881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3338889444 + 3338889445.

It is an arithmetic number, because the mean of its divisors is an integer number (3338889445).

Almost surely, 2^6677778889 is an apocalyptic number.

It is an amenable number.

6677778889 is a deficient number, since it is larger than the sum of its proper divisors (1).

6677778889 is an equidigital number, since it uses as much as digits as its factorization.

6677778889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 398297088, while the sum is 73.

The square root of 6677778889 is about 81717.6779466965. The cubic root of 6677778889 is about 1883.1171774545.

The spelling of 6677778889 in words is "six billion, six hundred seventy-seven million, seven hundred seventy-eight thousand, eight hundred eighty-nine".