166863158512 has 20 divisors (see below), whose sum is σ = 323541041056. Its totient is φ = 83368696320.

The previous prime is 166863158509. The next prime is 166863158513. The reversal of 166863158512 is 215851368661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166863158512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166863158513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3908289 + ... + 3950752.

Almost surely, 2^166863158512 is an apocalyptic number.

It is an amenable number.

166863158512 is a deficient number, since it is larger than the sum of its proper divisors (156677882544).

166863158512 is a wasteful number, since it uses less digits than its factorization.

166863158512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7860376 (or 7860370 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 52.

The spelling of 166863158512 in words is "one hundred sixty-six billion, eight hundred sixty-three million, one hundred fifty-eight thousand, five hundred twelve".