66668888668802 has 64 divisors (see below), whose sum is σ = 117468988266240. Its totient is φ = 27789403539456.

The previous prime is 66668888668787. The next prime is 66668888668841. The reversal of 66668888668802 is 20886688886666.

66668888668802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29112698 + ... + 31319114.

It is an arithmetic number, because the mean of its divisors is an integer number (1835452941660).

Almost surely, 2^{66668888668802} is an apocalyptic number.

66668888668802 is a deficient number, since it is larger than the sum of its proper divisors (50800099597438).

66668888668802 is a wasteful number, since it uses less digits than its factorization.

66668888668802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206875.

The product of its (nonzero) digits is 24461180928, while the sum is 86.

The spelling of 66668888668802 in words is "sixty-six trillion, six hundred sixty-eight billion, eight hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred two".