6649410643 has 2 divisors, whose sum is σ = 6649410644. Its totient is φ = 6649410642.

The previous prime is 6649410613. The next prime is 6649410661. The reversal of 6649410643 is 3460149466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6649410643 - 2⁵ = 6649410611 is a prime.

It is a super-3 number, since 3×6649410643³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6649410643.

It is not a weakly prime, because it can be changed into another prime (6649410613) 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, 3324705321 + 3324705322.

It is an arithmetic number, because the mean of its divisors is an integer number (3324705322).

Almost surely, 2^6649410643 is an apocalyptic number.

6649410643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649410643 is an equidigital number, since it uses as much as digits as its factorization.

6649410643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 6649410643 is about 81543.9184918164. The cubic root of 6649410643 is about 1880.4468006821.

The spelling of 6649410643 in words is "six billion, six hundred forty-nine million, four hundred ten thousand, six hundred forty-three".