668580337 has 4 divisors (see below), whose sum is σ = 678559216. Its totient is φ = 658601460.

The previous prime is 668580331. The next prime is 668580349. The reversal of 668580337 is 733085866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 668580337 - 2³ = 668580329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668580331) by changing a digit.

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, 4989339 + ... + 4989472.

It is an arithmetic number, because the mean of its divisors is an integer number (169639804).

Almost surely, 2^668580337 is an apocalyptic number.

668580337 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

668580337 is the 14929-th hex number.

It is an amenable number.

668580337 is a deficient number, since it is larger than the sum of its proper divisors (9978879).

668580337 is an equidigital number, since it uses as much as digits as its factorization.

668580337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9978878.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 668580337 is about 25856.9204856263. The cubic root of 668580337 is about 874.4155387267.

The spelling of 668580337 in words is "six hundred sixty-eight million, five hundred eighty thousand, three hundred thirty-seven".