17666668473 has 16 divisors (see below), whose sum is σ = 24490245696. Its totient is φ = 11319010560.

The previous prime is 17666668471. The next prime is 17666668489. The reversal of 17666668473 is 37486666671.

It is a happy number.

It is not a de Polignac number, because 17666668473 - 2¹ = 17666668471 is a prime.

It is a super-2 number, since 2×17666668473² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17666668471) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1063636 + ... + 1080117.

It is an arithmetic number, because the mean of its divisors is an integer number (1530640356).

Almost surely, 2^17666668473 is an apocalyptic number.

It is an amenable number.

17666668473 is a deficient number, since it is larger than the sum of its proper divisors (6823577223).

17666668473 is a wasteful number, since it uses less digits than its factorization.

17666668473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143864.

The product of its digits is 36578304, while the sum is 60.

The spelling of 17666668473 in words is "seventeen billion, six hundred sixty-six million, six hundred sixty-eight thousand, four hundred seventy-three".