12778182265666 has 8 divisors (see below), whose sum is σ = 19167305128704. Its totient is φ = 6389080556100.

The previous prime is 12778182265621. The next prime is 12778182265669. The reversal of 12778182265666 is 66656228187721.

It is a happy number.

12778182265666 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 (12778182265669) 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, 3680410 + ... + 6253141.

It is an arithmetic number, because the mean of its divisors is an integer number (2395913141088).

Almost surely, 2^{12778182265666} is an apocalyptic number.

12778182265666 is a deficient number, since it is larger than the sum of its proper divisors (6389122863038).

12778182265666 is an equidigital number, since it uses as much as digits as its factorization.

12778182265666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576736.

The product of its digits is 162570240, while the sum is 67.

The spelling of 12778182265666 in words is "twelve trillion, seven hundred seventy-eight billion, one hundred eighty-two million, two hundred sixty-five thousand, six hundred sixty-six".