6677809 has 2 divisors, whose sum is σ = 6677810. Its totient is φ = 6677808.

The previous prime is 6677789. The next prime is 6677813. The reversal of 6677809 is 9087766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6517809 + 160000 = 2553^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 6677809 - 2⁵ = 6677777 is a prime.

It is not a weakly prime, because it can be changed into another prime (6677309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3338904 + 3338905.

It is an arithmetic number, because the mean of its divisors is an integer number (3338905).

Almost surely, 2^6677809 is an apocalyptic number.

It is an amenable number.

6677809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6677809 is an equidigital number, since it uses as much as digits as its factorization.

6677809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 6677809 is about 2584.1457002267. The cubic root of 6677809 is about 188.3120007859.

Subtracting from 6677809 its sum of digits (43), we obtain a palindrome (6677766).

The spelling of 6677809 in words is "six million, six hundred seventy-seven thousand, eight hundred nine".