668055367608 has 16 divisors (see below), whose sum is σ = 1670138419080. Its totient is φ = 222685122528.

The previous prime is 668055367549. The next prime is 668055367631. The reversal of 668055367608 is 806763550866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13917820135 + ... + 13917820182.

Almost surely, 2^668055367608 is an apocalyptic number.

It is an amenable number.

668055367608 is an abundant number, since it is smaller than the sum of its proper divisors (1002083051472).

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

668055367608 is a wasteful number, since it uses less digits than its factorization.

668055367608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27835640326 (or 27835640322 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 668055367608 in words is "six hundred sixty-eight billion, fifty-five million, three hundred sixty-seven thousand, six hundred eight".