668822086668 has 24 divisors (see below), whose sum is σ = 1583877182272. Its totient is φ = 219613222224.

The previous prime is 668822086637. The next prime is 668822086711. The reversal of 668822086668 is 866680228866.

It is a super-2 number, since 2×668822086668² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668822086599 and 668822086608.

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 7 ways as a sum of consecutive naturals, for example, 415933330 + ... + 415934937.

Almost surely, 2^668822086668 is an apocalyptic number.

It is an amenable number.

668822086668 is an abundant number, since it is smaller than the sum of its proper divisors (915055095604).

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

668822086668 is a wasteful number, since it uses less digits than its factorization.

668822086668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831868341 (or 831868339 counting only the distinct ones).

The product of its (nonzero) digits is 127401984, while the sum is 66.

The spelling of 668822086668 in words is "six hundred sixty-eight billion, eight hundred twenty-two million, eighty-six thousand, six hundred sixty-eight".