6771642109 has 2 divisors, whose sum is σ = 6771642110. Its totient is φ = 6771642108.

The previous prime is 6771642091. The next prime is 6771642121. The reversal of 6771642109 is 9012461776.

Together with previous prime (6771642091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4127420025 + 2644222084 = 64245^2 + 51422^2 .

It is a cyclic number.

It is not a de Polignac number, because 6771642109 - 2¹⁷ = 6771511037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6771642509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3385821054 + 3385821055.

It is an arithmetic number, because the mean of its divisors is an integer number (3385821055).

Almost surely, 2^6771642109 is an apocalyptic number.

It is an amenable number.

6771642109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6771642109 is an equidigital number, since it uses as much as digits as its factorization.

6771642109 is an odious number, because the sum of its binary digits is odd.

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

The square root of 6771642109 is about 82289.9879025389. The cubic root of 6771642109 is about 1891.8992236288.

The spelling of 6771642109 in words is "six billion, seven hundred seventy-one million, six hundred forty-two thousand, one hundred nine".