668291359 has 2 divisors, whose sum is σ = 668291360. Its totient is φ = 668291358.

The previous prime is 668291357. The next prime is 668291383. The reversal of 668291359 is 953192866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 668291359 - 2¹ = 668291357 is a prime.

It is a super-2 number, since 2×668291359² = 893226681028133762, which contains 22 as substring.

Together with 668291357, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668291353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334145679 + 334145680.

It is an arithmetic number, because the mean of its divisors is an integer number (334145680).

Almost surely, 2^668291359 is an apocalyptic number.

668291359 is a deficient number, since it is larger than the sum of its proper divisors (1).

668291359 is an equidigital number, since it uses as much as digits as its factorization.

668291359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 49.

The square root of 668291359 is about 25851.3318612407. The cubic root of 668291359 is about 874.2895387761.

The spelling of 668291359 in words is "six hundred sixty-eight million, two hundred ninety-one thousand, three hundred fifty-nine".