201667638873 has 16 divisors (see below), whose sum is σ = 269179013120. Its totient is φ = 134300748816.

The previous prime is 201667638863. The next prime is 201667638929. The reversal of 201667638873 is 378836766102.

It is not a de Polignac number, because 201667638873 - 2⁵ = 201667638841 is a prime.

It is a super-2 number, since 2×201667638873² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201667638833) 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, 16789836 + ... + 16801842.

It is an arithmetic number, because the mean of its divisors is an integer number (16823688320).

Almost surely, 2^201667638873 is an apocalyptic number.

It is an amenable number.

201667638873 is a deficient number, since it is larger than the sum of its proper divisors (67511374247).

201667638873 is a wasteful number, since it uses less digits than its factorization.

201667638873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17556.

The product of its (nonzero) digits is 12192768, while the sum is 57.

The spelling of 201667638873 in words is "two hundred one billion, six hundred sixty-seven million, six hundred thirty-eight thousand, eight hundred seventy-three".