12280778066 has 16 divisors (see below), whose sum is σ = 18508092408. Its totient is φ = 6111436800.

The previous prime is 12280778063. The next prime is 12280778099. The reversal of 12280778066 is 66087708221.

It can be written as a sum of positive squares in 4 ways, for example, as 9492410041 + 2788368025 = 97429^2 + 52805^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12280778066.

It is not an unprimeable number, because it can be changed into a prime (12280778063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562306 + ... + 1570146.

Almost surely, 2^12280778066 is an apocalyptic number.

12280778066 is a deficient number, since it is larger than the sum of its proper divisors (6227314342).

12280778066 is a wasteful number, since it uses less digits than its factorization.

12280778066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11437.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 12280778066 in words is "twelve billion, two hundred eighty million, seven hundred seventy-eight thousand, sixty-six".