17121606666 has 16 divisors (see below), whose sum is σ = 34252672224. Its totient is φ = 5705625744.

The previous prime is 17121606653. The next prime is 17121606679. The reversal of 17121606666 is 66660612171.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (17121606653) and next prime (17121606679).

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 7 ways as a sum of consecutive naturals, for example, 370480 + ... + 414123.

It is an arithmetic number, because the mean of its divisors is an integer number (2140792014).

Almost surely, 2^17121606666 is an apocalyptic number.

17121606666 is an abundant number, since it is smaller than the sum of its proper divisors (17131065558).

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

17121606666 is a wasteful number, since it uses less digits than its factorization.

17121606666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788245.

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 17121606666 in words is "seventeen billion, one hundred twenty-one million, six hundred six thousand, six hundred sixty-six".