6677789 has 2 divisors, whose sum is σ = 6677790. Its totient is φ = 6677788.

The previous prime is 6677777. The next prime is 6677809. The reversal of 6677789 is 9877766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5026564 + 1651225 = 2242^2 + 1285^2 .

It is a cyclic number.

It is not a de Polignac number, because 6677789 - 2²⁰ = 5629213 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6677729) 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, 3338894 + 3338895.

It is an arithmetic number, because the mean of its divisors is an integer number (3338895).

Almost surely, 2^6677789 is an apocalyptic number.

It is an amenable number.

6677789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6677789 is an equidigital number, since it uses as much as digits as its factorization.

6677789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 50.

The square root of 6677789 is about 2584.1418304729. The cubic root of 6677789 is about 188.3118127880.

It can be divided in two parts, 66777 and 89, that added together give a palindrome (66866).

The spelling of 6677789 in words is "six million, six hundred seventy-seven thousand, seven hundred eighty-nine".