12166657717853 has 16 divisors (see below), whose sum is σ = 13230716539824. Its totient is φ = 11141316449280.

The previous prime is 12166657717849. The next prime is 12166657717867. The reversal of 12166657717853 is 35871775666121.

It can be written as a sum of positive squares in 8 ways, for example, as 5817734352004 + 6348923365849 = 2411998^2 + 2519707^2 .

It is not a de Polignac number, because 12166657717853 - 2² = 12166657717849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12166657717853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12166657717813) 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 in 15 ways as a sum of consecutive naturals, for example, 61919423 + ... + 62115603.

It is an arithmetic number, because the mean of its divisors is an integer number (826919783739).

Almost surely, 2^{12166657717853} is an apocalyptic number.

It is an amenable number.

12166657717853 is a deficient number, since it is larger than the sum of its proper divisors (1064058821971).

12166657717853 is a wasteful number, since it uses less digits than its factorization.

12166657717853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294832.

The product of its digits is 88905600, while the sum is 65.

The spelling of 12166657717853 in words is "twelve trillion, one hundred sixty-six billion, six hundred fifty-seven million, seven hundred seventeen thousand, eight hundred fifty-three".