6366729641 has 2 divisors, whose sum is σ = 6366729642. Its totient is φ = 6366729640.

The previous prime is 6366729599. The next prime is 6366729643. The reversal of 6366729641 is 1469276636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6197625625 + 169104016 = 78725^2 + 13004^2 .

It is a cyclic number.

It is not a de Polignac number, because 6366729641 - 2²² = 6362535337 is a prime.

It is a Sophie Germain prime.

Together with 6366729643, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6366729641.

It is not a weakly prime, because it can be changed into another prime (6366729643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3183364820 + 3183364821.

It is an arithmetic number, because the mean of its divisors is an integer number (3183364821).

Almost surely, 2^6366729641 is an apocalyptic number.

It is an amenable number.

6366729641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6366729641 is an equidigital number, since it uses as much as digits as its factorization.

6366729641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 50.

The square root of 6366729641 is about 79791.7893081738. The cubic root of 6366729641 is about 1853.4127063860.

The spelling of 6366729641 in words is "six billion, three hundred sixty-six million, seven hundred twenty-nine thousand, six hundred forty-one".