166561445136106 has 8 divisors (see below), whose sum is σ = 249842229303744. Its totient is φ = 83280702034860.

The previous prime is 166561445136091. The next prime is 166561445136137. The reversal of 166561445136106 is 601631544165661.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3641311 + ... + 18611341.

It is an arithmetic number, because the mean of its divisors is an integer number (31230278662968).

Almost surely, 2^{166561445136106} is an apocalyptic number.

166561445136106 is a deficient number, since it is larger than the sum of its proper divisors (83280784167638).

166561445136106 is a wasteful number, since it uses less digits than its factorization.

166561445136106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20533196.

The product of its (nonzero) digits is 9331200, while the sum is 55.

The spelling of 166561445136106 in words is "one hundred sixty-six trillion, five hundred sixty-one billion, four hundred forty-five million, one hundred thirty-six thousand, one hundred six".