6649705943 has 2 divisors, whose sum is σ = 6649705944. Its totient is φ = 6649705942.

The previous prime is 6649705919. The next prime is 6649705957. The reversal of 6649705943 is 3495079466.

6649705943 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 6649705943 - 2⁸ = 6649705687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6649707943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324852971 + 3324852972.

It is an arithmetic number, because the mean of its divisors is an integer number (3324852972).

Almost surely, 2^6649705943 is an apocalyptic number.

6649705943 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649705943 is an equidigital number, since it uses as much as digits as its factorization.

6649705943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The square root of 6649705943 is about 81545.7291524210. The cubic root of 6649705943 is about 1880.4746371201.

The spelling of 6649705943 in words is "six billion, six hundred forty-nine million, seven hundred five thousand, nine hundred forty-three".