166297209128 has 32 divisors (see below), whose sum is σ = 312232060800. Its totient is φ = 83035408512.

The previous prime is 166297209059. The next prime is 166297209137. The reversal of 166297209128 is 821902792661.

It is a self number, because there is not a number n which added to its sum of digits gives 166297209128.

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, 26272268 + ... + 26278596.

It is an arithmetic number, because the mean of its divisors is an integer number (9757251900).

Almost surely, 2^166297209128 is an apocalyptic number.

It is an amenable number.

166297209128 is a deficient number, since it is larger than the sum of its proper divisors (145934851672).

166297209128 is a wasteful number, since it uses less digits than its factorization.

166297209128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10289 (or 10285 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 166297209128 in words is "one hundred sixty-six billion, two hundred ninety-seven million, two hundred nine thousand, one hundred twenty-eight".