1244666663 has 2 divisors, whose sum is σ = 1244666664. Its totient is φ = 1244666662.

The previous prime is 1244666653. The next prime is 1244666669. The reversal of 1244666663 is 3666664421.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1244666663 - 2¹⁸ = 1244404519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244666669) 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, 622333331 + 622333332.

It is an arithmetic number, because the mean of its divisors is an integer number (622333332).

Almost surely, 2^1244666663 is an apocalyptic number.

1244666663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244666663 is an equidigital number, since it uses as much as digits as its factorization.

1244666663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 44.

The square root of 1244666663 is about 35279.8336589049. The cubic root of 1244666663 is about 1075.6831174291.

The spelling of 1244666663 in words is "one billion, two hundred forty-four million, six hundred sixty-six thousand, six hundred sixty-three".