17121345666 has 8 divisors (see below), whose sum is σ = 34242691344. Its totient is φ = 5707115220.

The previous prime is 17121345599. The next prime is 17121345667. The reversal of 17121345666 is 66654312171.

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

17121345666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (17121345667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1426778800 + ... + 1426778811.

It is an arithmetic number, because the mean of its divisors is an integer number (4280336418).

Almost surely, 2^17121345666 is an apocalyptic number.

17121345666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

17121345666 is a wasteful number, since it uses less digits than its factorization.

17121345666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853557616.

The product of its digits is 181440, while the sum is 42.

The spelling of 17121345666 in words is "seventeen billion, one hundred twenty-one million, three hundred forty-five thousand, six hundred sixty-six".