17666012161 has 8 divisors (see below), whose sum is σ = 20206327680. Its totient is φ = 15129846528.

The previous prime is 17666012159. The next prime is 17666012171. The reversal of 17666012161 is 16121066671.

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 17666012161 - 2¹ = 17666012159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17666012161.

It is not an unprimeable number, because it can be changed into a prime (17666012131) 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, 1028341 + ... + 1045378.

It is an arithmetic number, because the mean of its divisors is an integer number (2525790960).

Almost surely, 2^17666012161 is an apocalyptic number.

It is an amenable number.

17666012161 is a deficient number, since it is larger than the sum of its proper divisors (2540315519).

17666012161 is a wasteful number, since it uses less digits than its factorization.

17666012161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074943.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 17666012161 in words is "seventeen billion, six hundred sixty-six million, twelve thousand, one hundred sixty-one".