166165305198 has 16 divisors (see below), whose sum is σ = 332347304016. Its totient is φ = 55385652800.

The previous prime is 166165305191. The next prime is 166165305209. The reversal of 166165305198 is 891503561661.

It is a super-2 number, since 2×166165305198² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166165305198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166165305191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564261 + ... + 806672.

It is an arithmetic number, because the mean of its divisors is an integer number (20771706501).

Almost surely, 2^166165305198 is an apocalyptic number.

166165305198 is an abundant number, since it is smaller than the sum of its proper divisors (166181998818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166165305198 is a wasteful number, since it uses less digits than its factorization.

166165305198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391139.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 166165305198 in words is "one hundred sixty-six billion, one hundred sixty-five million, three hundred five thousand, one hundred ninety-eight".