166400645111606 has 8 divisors (see below), whose sum is σ = 252024278033424. Its totient is φ = 82392552433800.

The previous prime is 166400645111549. The next prime is 166400645111609. The reversal of 166400645111606 is 606111546004661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166400645111609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403885060745 + ... + 403885061156.

It is an arithmetic number, because the mean of its divisors is an integer number (31503034754178).

Almost surely, 2^{166400645111606} is an apocalyptic number.

166400645111606 is a deficient number, since it is larger than the sum of its proper divisors (85623632921818).

166400645111606 is a wasteful number, since it uses less digits than its factorization.

166400645111606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807770122006.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 166400645111606 in words is "one hundred sixty-six trillion, four hundred billion, six hundred forty-five million, one hundred eleven thousand, six hundred six".