166685350017 has 8 divisors (see below), whose sum is σ = 223997111296. Its totient is φ = 110248577712.

The previous prime is 166685350003. The next prime is 166685350037. The reversal of 166685350017 is 710053586661.

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

It is not a de Polignac number, because 166685350017 - 2¹⁶ = 166685284481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166685350037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218746798 + ... + 218747559.

It is an arithmetic number, because the mean of its divisors is an integer number (27999638912).

Almost surely, 2^166685350017 is an apocalyptic number.

It is an amenable number.

166685350017 is a deficient number, since it is larger than the sum of its proper divisors (57311761279).

166685350017 is a wasteful number, since it uses less digits than its factorization.

166685350017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437494487.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 166685350017 in words is "one hundred sixty-six billion, six hundred eighty-five million, three hundred fifty thousand, seventeen".