668459822 has 8 divisors (see below), whose sum is σ = 1061671536. Its totient is φ = 314569312.

The previous prime is 668459819. The next prime is 668459893. The reversal of 668459822 is 228954866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9830258 + ... + 9830325.

It is an arithmetic number, because the mean of its divisors is an integer number (132708942).

Almost surely, 2^668459822 is an apocalyptic number.

668459822 is a deficient number, since it is larger than the sum of its proper divisors (393211714).

668459822 is a wasteful number, since it uses less digits than its factorization.

668459822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19660602.

The product of its digits is 1658880, while the sum is 50.

The square root of 668459822 is about 25854.5899600052. The cubic root of 668459822 is about 874.3629962895.

It can be divided in two parts, 66845 and 9822, that added together give a palindrome (76667).

The spelling of 668459822 in words is "six hundred sixty-eight million, four hundred fifty-nine thousand, eight hundred twenty-two".