663296869 has 2 divisors, whose sum is σ = 663296870. Its totient is φ = 663296868.

The previous prime is 663296861. The next prime is 663296899. The reversal of 663296869 is 968692366.

It is a happy number.

663296869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366148225 + 297148644 = 19135^2 + 17238^2 .

It is a cyclic number.

It is not a de Polignac number, because 663296869 - 2³ = 663296861 is a prime.

It is a super-2 number, since 2×663296869² = 879925472850406322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663296861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331648434 + 331648435.

It is an arithmetic number, because the mean of its divisors is an integer number (331648435).

Almost surely, 2^663296869 is an apocalyptic number.

It is an amenable number.

663296869 is a deficient number, since it is larger than the sum of its proper divisors (1).

663296869 is an equidigital number, since it uses as much as digits as its factorization.

663296869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 55.

The square root of 663296869 is about 25754.5504522987. The cubic root of 663296869 is about 872.1060830490.

The spelling of 663296869 in words is "six hundred sixty-three million, two hundred ninety-six thousand, eight hundred sixty-nine".