2668663 has 2 divisors, whose sum is σ = 2668664. Its totient is φ = 2668662.

The previous prime is 2668639. The next prime is 2668669. The reversal of 2668663 is 3668662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668663 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334331 + 1334332.

It is an arithmetic number, because the mean of its divisors is an integer number (1334332).

2^2668663 is an apocalyptic number.

2668663 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668663 is an equidigital number, since it uses as much as digits as its factorization.

2668663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 37.

The square root of 2668663 is about 1633.6042972519. The cubic root of 2668663 is about 138.7068507441.

Subtracting 2668663 from its reverse (3668662), we obtain a palindrome (999999).

The spelling of 2668663 in words is "two million, six hundred sixty-eight thousand, six hundred sixty-three".