12777806 has 8 divisors (see below), whose sum is σ = 19827720. Its totient is φ = 6168568.

The previous prime is 12777803. The next prime is 12777827. The reversal of 12777806 is 60877721.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12777806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110096 + ... + 110211.

It is an arithmetic number, because the mean of its divisors is an integer number (2478465).

Almost surely, 2^12777806 is an apocalyptic number.

12777806 is a deficient number, since it is larger than the sum of its proper divisors (7049914).

12777806 is a wasteful number, since it uses less digits than its factorization.

12777806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220338.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 12777806 is about 3574.6057125227. The cubic root of 12777806 is about 233.7861415705.

The spelling of 12777806 in words is "twelve million, seven hundred seventy-seven thousand, eight hundred six".