166771812231 has 24 divisors (see below), whose sum is σ = 241351643520. Its totient is φ = 110969546256.

The previous prime is 166771812199. The next prime is 166771812247. The reversal of 166771812231 is 132218177661.

It is not a de Polignac number, because 166771812231 - 2⁵ = 166771812199 is a prime.

It is a super-2 number, since 2×166771812231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166771882231) 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 23 ways as a sum of consecutive naturals, for example, 11984980 + ... + 11998886.

It is an arithmetic number, because the mean of its divisors is an integer number (10056318480).

Almost surely, 2^166771812231 is an apocalyptic number.

166771812231 is a deficient number, since it is larger than the sum of its proper divisors (74579831289).

166771812231 is a wasteful number, since it uses less digits than its factorization.

166771812231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16355 (or 16352 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

Adding to 166771812231 its reverse (132218177661), we get a palindrome (298989989892).

The spelling of 166771812231 in words is "one hundred sixty-six billion, seven hundred seventy-one million, eight hundred twelve thousand, two hundred thirty-one".