668877227408 has 40 divisors (see below), whose sum is σ = 1412453013888. Its totient is φ = 304993130112.

The previous prime is 668877227399. The next prime is 668877227429. The reversal of 668877227408 is 804722778866.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19354760 + ... + 19389287.

Almost surely, 2^668877227408 is an apocalyptic number.

It is an amenable number.

668877227408 is an abundant number, since it is smaller than the sum of its proper divisors (743575786480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668877227408 is a wasteful number, since it uses less digits than its factorization.

668877227408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38744151 (or 38744145 counting only the distinct ones).

The product of its (nonzero) digits is 101154816, while the sum is 65.

The spelling of 668877227408 in words is "six hundred sixty-eight billion, eight hundred seventy-seven million, two hundred twenty-seven thousand, four hundred eight".