6766399 has 2 divisors, whose sum is σ = 6766400. Its totient is φ = 6766398.

The previous prime is 6766369. The next prime is 6766411. The reversal of 6766399 is 9936676.

6766399 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6766399 - 2¹³ = 6758207 is a prime.

6766399 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6766369) 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, 3383199 + 3383200.

It is an arithmetic number, because the mean of its divisors is an integer number (3383200).

Almost surely, 2^6766399 is an apocalyptic number.

6766399 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766399 is an equidigital number, since it uses as much as digits as its factorization.

6766399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 46.

The square root of 6766399 is about 2601.2302858455. The cubic root of 6766399 is about 189.1410814520.

It can be divided in two parts, 67 and 66399, that added together give a palindrome (66466).

The spelling of 6766399 in words is "six million, seven hundred sixty-six thousand, three hundred ninety-nine".