12106216660066 has 4 divisors (see below), whose sum is σ = 18159324990102. Its totient is φ = 6053108330032.

The previous prime is 12106216660033. The next prime is 12106216660091. The reversal of 12106216660066 is 66006661260121.

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

It can be written as a sum of positive squares in only one way, i.e., 10096283826225 + 2009932833841 = 3177465^2 + 1417721^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3026554165015 + ... + 3026554165018.

Almost surely, 2^{12106216660066} is an apocalyptic number.

12106216660066 is a deficient number, since it is larger than the sum of its proper divisors (6053108330036).

12106216660066 is an equidigital number, since it uses as much as digits as its factorization.

12106216660066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6053108330035.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 12106216660066 in words is "twelve trillion, one hundred six billion, two hundred sixteen million, six hundred sixty thousand, sixty-six".