6764778269 has 2 divisors, whose sum is σ = 6764778270. Its totient is φ = 6764778268.

The previous prime is 6764778247. The next prime is 6764778301. The reversal of 6764778269 is 9628774676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4390652644 + 2374125625 = 66262^2 + 48725^2 .

It is a cyclic number.

It is not a de Polignac number, because 6764778269 - 2¹⁶ = 6764712733 is a prime.

It is a super-2 number, since 2×6764778269² = 91524450057469272722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6764778869) 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, 3382389134 + 3382389135.

It is an arithmetic number, because the mean of its divisors is an integer number (3382389135).

Almost surely, 2^6764778269 is an apocalyptic number.

It is an amenable number.

6764778269 is a deficient number, since it is larger than the sum of its proper divisors (1).

6764778269 is an equidigital number, since it uses as much as digits as its factorization.

6764778269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42674688, while the sum is 62.

The square root of 6764778269 is about 82248.2721338266. The cubic root of 6764778269 is about 1891.2597882044.

The spelling of 6764778269 in words is "six billion, seven hundred sixty-four million, seven hundred seventy-eight thousand, two hundred sixty-nine".