6727961861 has 2 divisors, whose sum is σ = 6727961862. Its totient is φ = 6727961860.

The previous prime is 6727961843. The next prime is 6727961873. The reversal of 6727961861 is 1681697276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6552902500 + 175059361 = 80950^2 + 13231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6727961861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6727960861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3363980930 + 3363980931.

It is an arithmetic number, because the mean of its divisors is an integer number (3363980931).

Almost surely, 2^6727961861 is an apocalyptic number.

It is an amenable number.

6727961861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6727961861 is an equidigital number, since it uses as much as digits as its factorization.

6727961861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The square root of 6727961861 is about 82024.1541315727. The cubic root of 6727961861 is about 1887.8225682997.

The spelling of 6727961861 in words is "six billion, seven hundred twenty-seven million, nine hundred sixty-one thousand, eight hundred sixty-one".