668588337 has 10 divisors (see below), whose sum is σ = 998755538. Its totient is φ = 445725504.

The previous prime is 668588299. The next prime is 668588339. The reversal of 668588337 is 733885866.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 435598641 + 232989696 = 20871^2 + 15264^2 .

It is not a de Polignac number, because 668588337 - 2¹⁸ = 668326193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668588339) 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 in 9 ways as a sum of consecutive naturals, for example, 4127008 + ... + 4127169.

Almost surely, 2^668588337 is an apocalyptic number.

It is an amenable number.

668588337 is a deficient number, since it is larger than the sum of its proper divisors (330167201).

668588337 is an equidigital number, since it uses as much as digits as its factorization.

668588337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8254189 (or 8254180 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 668588337 is about 25857.0751826265. The cubic root of 668588337 is about 874.4190263636.

The spelling of 668588337 in words is "six hundred sixty-eight million, five hundred eighty-eight thousand, three hundred thirty-seven".