12666777676 has 48 divisors (see below), whose sum is σ = 25925760000. Its totient is φ = 5302194048.

The previous prime is 12666777547. The next prime is 12666777713. The reversal of 12666777676 is 67677766621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647040 + ... + 666328.

It is an arithmetic number, because the mean of its divisors is an integer number (540120000).

Almost surely, 2^12666777676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12666777676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12962880000).

12666777676 is an abundant number, since it is smaller than the sum of its proper divisors (13258982324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12666777676 is a wasteful number, since it uses less digits than its factorization.

12666777676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19846 (or 19844 counting only the distinct ones).

The product of its digits is 37340352, while the sum is 61.

The spelling of 12666777676 in words is "twelve billion, six hundred sixty-six million, seven hundred seventy-seven thousand, six hundred seventy-six".