12766816776 has 64 divisors (see below), whose sum is σ = 36593308800. Its totient is φ = 3635993088.

The previous prime is 12766816771. The next prime is 12766816787. The reversal of 12766816776 is 67761866721.

It is a super-2 number, since 2×12766816776² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (12766816771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68811 + ... + 173978.

It is an arithmetic number, because the mean of its divisors is an integer number (571770450).

Almost surely, 2^12766816776 is an apocalyptic number.

It is an amenable number.

12766816776 is an abundant number, since it is smaller than the sum of its proper divisors (23826492024).

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

12766816776 is a wasteful number, since it uses less digits than its factorization.

12766816776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243118 (or 243114 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 57.

The spelling of 12766816776 in words is "twelve billion, seven hundred sixty-six million, eight hundred sixteen thousand, seven hundred seventy-six".