66888888886748 has 6 divisors (see below), whose sum is σ = 117055555551816. Its totient is φ = 33444444443372.

The previous prime is 66888888886747. The next prime is 66888888886753. The reversal of 66888888886748 is 84768888888866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66888888886747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361111110840 + ... + 8361111110847.

It is an arithmetic number, because the mean of its divisors is an integer number (19509259258636).

Almost surely, 2^{66888888886748} is an apocalyptic number.

It is an amenable number.

66888888886748 is a deficient number, since it is larger than the sum of its proper divisors (50166666665068).

66888888886748 is a wasteful number, since it uses less digits than its factorization.

66888888886748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16722222221691 (or 16722222221689 counting only the distinct ones).

The product of its digits is 811748818944, while the sum is 101.

The spelling of 66888888886748 in words is "sixty-six trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-six thousand, seven hundred forty-eight".