6664017643 has 2 divisors, whose sum is σ = 6664017644. Its totient is φ = 6664017642.

The previous prime is 6664017589. The next prime is 6664017683. The reversal of 6664017643 is 3467104666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6664017643 - 2⁹ = 6664017131 is a prime.

It is a super-2 number, since 2×6664017643² = 88818262292430550898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6664017643.

It is not a weakly prime, because it can be changed into another prime (6664017683) 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, 3332008821 + 3332008822.

It is an arithmetic number, because the mean of its divisors is an integer number (3332008822).

Almost surely, 2^6664017643 is an apocalyptic number.

6664017643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664017643 is an equidigital number, since it uses as much as digits as its factorization.

6664017643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 43.

The square root of 6664017643 is about 81633.4345902462. The cubic root of 6664017643 is about 1881.8227420658.

The spelling of 6664017643 in words is "six billion, six hundred sixty-four million, seventeen thousand, six hundred forty-three".