166338878668 has 24 divisors (see below), whose sum is σ = 295364149920. Its totient is φ = 81950480640.

The previous prime is 166338878617. The next prime is 166338878681. The reversal of 166338878668 is 866878833661.

It is a junction number, because it is equal to n+sod(n) for n = 166338878597 and 166338878606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323188 + ... + 661156.

It is an arithmetic number, because the mean of its divisors is an integer number (12306839580).

Almost surely, 2^166338878668 is an apocalyptic number.

It is an amenable number.

166338878668 is a deficient number, since it is larger than the sum of its proper divisors (129025271252).

166338878668 is a wasteful number, since it uses less digits than its factorization.

166338878668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339777 (or 339775 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 70.

The spelling of 166338878668 in words is "one hundred sixty-six billion, three hundred thirty-eight million, eight hundred seventy-eight thousand, six hundred sixty-eight".