66998886700 has 36 divisors (see below), whose sum is σ = 145400928120. Its totient is φ = 26797095040.

The previous prime is 66998886683. The next prime is 66998886719. The reversal of 66998886700 is 768889966.

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 11 ways as a sum of consecutive naturals, for example, 1391631 + ... + 1438969.

It is an arithmetic number, because the mean of its divisors is an integer number (4038914670).

Almost surely, 2^66998886700 is an apocalyptic number.

It is an amenable number.

66998886700 is an abundant number, since it is smaller than the sum of its proper divisors (78402041420).

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

66998886700 is a wasteful number, since it uses less digits than its factorization.

66998886700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61506 (or 61499 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 66998886700 in words is "sixty-six billion, nine hundred ninety-eight million, eight hundred eighty-six thousand, seven hundred".