6436663 has 2 divisors, whose sum is σ = 6436664. Its totient is φ = 6436662.

The previous prime is 6436657. The next prime is 6436667. The reversal of 6436663 is 3666346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6436663 - 2⁹ = 6436151 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6436667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218331 + 3218332.

It is an arithmetic number, because the mean of its divisors is an integer number (3218332).

Almost surely, 2^6436663 is an apocalyptic number.

6436663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6436663 is an equidigital number, since it uses as much as digits as its factorization.

6436663 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 6436663 is about 2537.0579417901. The cubic root of 6436663 is about 186.0174088612.

It can be divided in two parts, 64 and 36663, that multiplied together give a palindrome (2346432).

The spelling of 6436663 in words is "six million, four hundred thirty-six thousand, six hundred sixty-three".