17427217306661 has 16 divisors (see below), whose sum is σ = 17991105824640. Its totient is φ = 16868289372480.

The previous prime is 17427217306613. The next prime is 17427217306771. The reversal of 17427217306661 is 16660371272471.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17427217306661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17427217308661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16965320 + ... + 17963198.

It is an arithmetic number, because the mean of its divisors is an integer number (1124444114040).

Almost surely, 2^{17427217306661} is an apocalyptic number.

It is an amenable number.

17427217306661 is a deficient number, since it is larger than the sum of its proper divisors (563888517979).

17427217306661 is a wasteful number, since it uses less digits than its factorization.

17427217306661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000364.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 17427217306661 in words is "seventeen trillion, four hundred twenty-seven billion, two hundred seventeen million, three hundred six thousand, six hundred sixty-one".