12766166144 has 16 divisors (see below), whose sum is σ = 25432596870. Its totient is φ = 6383083008.

The previous prime is 12766166143. The next prime is 12766166159. The reversal of 12766166144 is 44166166721.

It can be written as a sum of positive squares in only one way, i.e., 12434926144 + 331240000 = 111512^2 + 18200^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 12766166095 and 12766166104.

It is not an unprimeable number, because it can be changed into a prime (12766166143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49867709 + ... + 49867964.

Almost surely, 2^12766166144 is an apocalyptic number.

It is an amenable number.

12766166144 is a deficient number, since it is larger than the sum of its proper divisors (12666430726).

12766166144 is an frugal number, since it uses more digits than its factorization.

12766166144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99735687 (or 99735675 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The spelling of 12766166144 in words is "twelve billion, seven hundred sixty-six million, one hundred sixty-six thousand, one hundred forty-four".