66868100917 has 8 divisors (see below), whose sum is σ = 70805295936. Its totient is φ = 62931325632.

The previous prime is 66868100909. The next prime is 66868100921. The reversal of 66868100917 is 71900186866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66868100917 - 2³ = 66868100909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66868103917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259198 + ... + 448240.

It is an arithmetic number, because the mean of its divisors is an integer number (8850661992).

Almost surely, 2^66868100917 is an apocalyptic number.

It is an amenable number.

66868100917 is a deficient number, since it is larger than the sum of its proper divisors (3937195019).

66868100917 is a wasteful number, since it uses less digits than its factorization.

66868100917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209867.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 66868100917 in words is "sixty-six billion, eight hundred sixty-eight million, one hundred thousand, nine hundred seventeen".