12766816770 has 32 divisors (see below), whose sum is σ = 31972551552. Its totient is φ = 3256463232.

The previous prime is 12766816763. The next prime is 12766816771. The reversal of 12766816770 is 7761866721.

It is a super-2 number, since 2×12766816770² (a number of 21 digits) contains 22 as substring.

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, 9250627 + ... + 9252006.

It is an arithmetic number, because the mean of its divisors is an integer number (999142236).

Almost surely, 2^12766816770 is an apocalyptic number.

12766816770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12766816770 is an abundant number, since it is smaller than the sum of its proper divisors (19205734782).

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

12766816770 is a wasteful number, since it uses less digits than its factorization.

12766816770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18502666.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 12766816770 in words is "twelve billion, seven hundred sixty-six million, eight hundred sixteen thousand, seven hundred seventy".