668296289 has 2 divisors, whose sum is σ = 668296290. Its totient is φ = 668296288.

The previous prime is 668296273. The next prime is 668296319. The reversal of 668296289 is 982692866.

668296289 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., 440286289 + 228010000 = 20983^2 + 15100^2 .

It is a cyclic number.

It is not a de Polignac number, because 668296289 - 2⁴ = 668296273 is a prime.

It is not a weakly prime, because it can be changed into another prime (668296259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334148144 + 334148145.

It is an arithmetic number, because the mean of its divisors is an integer number (334148145).

Almost surely, 2^668296289 is an apocalyptic number.

It is an amenable number.

668296289 is a deficient number, since it is larger than the sum of its proper divisors (1).

668296289 is an equidigital number, since it uses as much as digits as its factorization.

668296289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 56.

The square root of 668296289 is about 25851.4272139857. The cubic root of 668296289 is about 874.2916886552.

The spelling of 668296289 in words is "six hundred sixty-eight million, two hundred ninety-six thousand, two hundred eighty-nine".