66893026868 has 12 divisors (see below), whose sum is σ = 118711569312. Its totient is φ = 32975435640.

The previous prime is 66893026867. The next prime is 66893026873. The reversal of 66893026868 is 86862039866.

It is a self number, because there is not a number n which added to its sum of digits gives 66893026868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66893026867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117769130 + ... + 117769697.

It is an arithmetic number, because the mean of its divisors is an integer number (9892630776).

Almost surely, 2^66893026868 is an apocalyptic number.

It is an amenable number.

66893026868 is a deficient number, since it is larger than the sum of its proper divisors (51818542444).

66893026868 is a wasteful number, since it uses less digits than its factorization.

66893026868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235538902 (or 235538900 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 62.

The spelling of 66893026868 in words is "sixty-six billion, eight hundred ninety-three million, twenty-six thousand, eight hundred sixty-eight".