12150661522166 has 4 divisors (see below), whose sum is σ = 18225992283252. Its totient is φ = 6075330761082.

The previous prime is 12150661522159. The next prime is 12150661522169. The reversal of 12150661522166 is 66122516605121.

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

It is a super-2 number, since 2×12150661522166² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12150661522169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3037665380540 + ... + 3037665380543.

It is an arithmetic number, because the mean of its divisors is an integer number (4556498070813).

Almost surely, 2^{12150661522166} is an apocalyptic number.

12150661522166 is a deficient number, since it is larger than the sum of its proper divisors (6075330761086).

12150661522166 is an equidigital number, since it uses as much as digits as its factorization.

12150661522166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075330761085.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 12150661522166 in words is "twelve trillion, one hundred fifty billion, six hundred sixty-one million, five hundred twenty-two thousand, one hundred sixty-six".