66668888668888 has 64 divisors (see below), whose sum is σ = 144391925030400. Its totient is φ = 28521037662720.

The previous prime is 66668888668873. The next prime is 66668888668933. The reversal of 66668888668888 is 88886688886666.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66668888668793 and 66668888668802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117732493 + ... + 118297411.

It is an arithmetic number, because the mean of its divisors is an integer number (2256123828600).

It is a self-describing number.

Almost surely, 2^{66668888668888} is an apocalyptic number.

66668888668888 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66668888668888 is an abundant number, since it is smaller than the sum of its proper divisors (77723036361512).

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

66668888668888 is a wasteful number, since it uses less digits than its factorization.

66668888668888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643840 (or 643836 counting only the distinct ones).

The product of its digits is 782757789696, while the sum is 100.

The spelling of 66668888668888 in words is "sixty-six trillion, six hundred sixty-eight billion, eight hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred eighty-eight".