12166216016 has 20 divisors (see below), whose sum is σ = 24146972724. Its totient is φ = 5934739200.

The previous prime is 12166215967. The next prime is 12166216019. The reversal of 12166216016 is 61061266121.

It can be written as a sum of positive squares in 2 ways, for example, as 4805262400 + 7360953616 = 69320^2 + 85796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166216019) 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, 9272375 + ... + 9273686.

Almost surely, 2^12166216016 is an apocalyptic number.

12166216016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12166216016 is a deficient number, since it is larger than the sum of its proper divisors (11980756708).

12166216016 is a wasteful number, since it uses less digits than its factorization.

12166216016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18546110 (or 18546104 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 12166216016 in words is "twelve billion, one hundred sixty-six million, two hundred sixteen thousand, sixteen".