66668888668803 has 16 divisors (see below), whose sum is σ = 94123169712000. Its totient is φ = 41830399241856.

The previous prime is 66668888668787. The next prime is 66668888668841. The reversal of 66668888668803 is 30886688886666.

It is not a de Polignac number, because 66668888668803 - 2⁴ = 66668888668787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66668888668803.

It is not an unprimeable number, because it can be changed into a prime (66668888668873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14533225 + ... + 18562122.

It is an arithmetic number, because the mean of its divisors is an integer number (5882698107000).

Almost surely, 2^{66668888668803} is an apocalyptic number.

66668888668803 is a deficient number, since it is larger than the sum of its proper divisors (27454281043197).

66668888668803 is a wasteful number, since it uses less digits than its factorization.

66668888668803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33134866.

The product of its (nonzero) digits is 36691771392, while the sum is 87.

The spelling of 66668888668803 in words is "sixty-six trillion, six hundred sixty-eight billion, eight hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred three".