16668500185 has 16 divisors (see below), whose sum is σ = 21043853712. Its totient is φ = 12657945600.

The previous prime is 16668500183. The next prime is 16668500203. The reversal of 16668500185 is 58100586661.

It can be written as a sum of positive squares in 8 ways, for example, as 1341317376 + 15327182809 = 36624^2 + 123803^2 .

It is not a de Polignac number, because 16668500185 - 2¹ = 16668500183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16668500183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091196 + ... + 1106365.

It is an arithmetic number, because the mean of its divisors is an integer number (1315240857).

Almost surely, 2^16668500185 is an apocalyptic number.

It is an amenable number.

16668500185 is a deficient number, since it is larger than the sum of its proper divisors (4375353527).

16668500185 is a wasteful number, since it uses less digits than its factorization.

16668500185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197644.

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 16668500185 in words is "sixteen billion, six hundred sixty-eight million, five hundred thousand, one hundred eighty-five".