6566663 has 2 divisors, whose sum is σ = 6566664. Its totient is φ = 6566662.

The previous prime is 6566657. The next prime is 6566701. The reversal of 6566663 is 3666656.

6566663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (6566701) can be obtained adding 6566663 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6566663 - 2⁸ = 6566407 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 (6566363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3283331 + 3283332.

It is an arithmetic number, because the mean of its divisors is an integer number (3283332).

Almost surely, 2^6566663 is an apocalyptic number.

6566663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6566663 is an equidigital number, since it uses as much as digits as its factorization.

6566663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 38.

The square root of 6566663 is about 2562.5500970713. The cubic root of 6566663 is about 187.2613901068.

The spelling of 6566663 in words is "six million, five hundred sixty-six thousand, six hundred sixty-three".