6366643 has 2 divisors, whose sum is σ = 6366644. Its totient is φ = 6366642.

The previous prime is 6366629. The next prime is 6366649. The reversal of 6366643 is 3466636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6366643 - 2¹⁷ = 6235571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6366599 and 6366608.

It is not a weakly prime, because it can be changed into another prime (6366649) 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, 3183321 + 3183322.

It is an arithmetic number, because the mean of its divisors is an integer number (3183322).

Almost surely, 2^6366643 is an apocalyptic number.

6366643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6366643 is an equidigital number, since it uses as much as digits as its factorization.

6366643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 34.

The square root of 6366643 is about 2523.2207592678. The cubic root of 6366643 is about 185.3404299021.

The spelling of 6366643 in words is "six million, three hundred sixty-six thousand, six hundred forty-three".