12663777399 has 16 divisors (see below), whose sum is σ = 20781583872. Its totient is φ = 6679794528.

The previous prime is 12663777311. The next prime is 12663777407. The reversal of 12663777399 is 99377736621.

It is a happy number.

It is not a de Polignac number, because 12663777399 - 2⁷ = 12663777271 is a prime.

It is a super-2 number, since 2×12663777399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12663777199) 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, 23193459 + ... + 23194004.

It is an arithmetic number, because the mean of its divisors is an integer number (1298848992).

Almost surely, 2^12663777399 is an apocalyptic number.

12663777399 is a deficient number, since it is larger than the sum of its proper divisors (8117806473).

12663777399 is a wasteful number, since it uses less digits than its factorization.

12663777399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46387486.

The product of its digits is 18003384, while the sum is 60.

The spelling of 12663777399 in words is "twelve billion, six hundred sixty-three million, seven hundred seventy-seven thousand, three hundred ninety-nine".