166899842193 has 8 divisors (see below), whose sum is σ = 254323569088. Its totient is φ = 95371338384.

The previous prime is 166899842189. The next prime is 166899842227. The reversal of 166899842193 is 391248998661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166899842193 - 2² = 166899842189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166899842293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3973805746 + ... + 3973805787.

It is an arithmetic number, because the mean of its divisors is an integer number (31790446136).

Almost surely, 2^166899842193 is an apocalyptic number.

It is an amenable number.

166899842193 is a deficient number, since it is larger than the sum of its proper divisors (87423726895).

166899842193 is an equidigital number, since it uses as much as digits as its factorization.

166899842193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7947611543.

The product of its digits is 40310784, while the sum is 66.

The spelling of 166899842193 in words is "one hundred sixty-six billion, eight hundred ninety-nine million, eight hundred forty-two thousand, one hundred ninety-three".