166106561116107 has 4 divisors (see below), whose sum is σ = 221475414821480. Its totient is φ = 110737707410736.

The previous prime is 166106561116079. The next prime is 166106561116109. The reversal of 166106561116107 is 701611165601661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 166106561116107 - 2¹⁰ = 166106561115083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166106561116109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27684426852682 + ... + 27684426852687.

It is an arithmetic number, because the mean of its divisors is an integer number (55368853705370).

Almost surely, 2^{166106561116107} is an apocalyptic number.

166106561116107 is a deficient number, since it is larger than the sum of its proper divisors (55368853705373).

166106561116107 is an equidigital number, since it uses as much as digits as its factorization.

166106561116107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55368853705372.

The product of its (nonzero) digits is 272160, while the sum is 48.

The spelling of 166106561116107 in words is "one hundred sixty-six trillion, one hundred six billion, five hundred sixty-one million, one hundred sixteen thousand, one hundred seven".