12766778 has 8 divisors (see below), whose sum is σ = 19165440. Its totient is φ = 6378300.

The previous prime is 12766777. The next prime is 12766781. The reversal of 12766778 is 87766721.

12766778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12766777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053 + ... + 5903.

It is an arithmetic number, because the mean of its divisors is an integer number (2395680).

Almost surely, 2^12766778 is an apocalyptic number.

12766778 is a deficient number, since it is larger than the sum of its proper divisors (6398662).

12766778 is a wasteful number, since it uses less digits than its factorization.

12766778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5092.

The product of its digits is 197568, while the sum is 44.

The square root of 12766778 is about 3573.0628318013. The cubic root of 12766778 is about 233.7188651373.

The spelling of 12766778 in words is "twelve million, seven hundred sixty-six thousand, seven hundred seventy-eight".