27796666664778 has 32 divisors (see below), whose sum is σ = 60647984770752. Its totient is φ = 8423133427200.

The previous prime is 27796666664771. The next prime is 27796666664803. The reversal of 27796666664778 is 87746666669772.

It is a junction number, because it is equal to n+sod(n) for n = 27796666664694 and 27796666664703.

It is not an unprimeable number, because it can be changed into a prime (27796666664771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3292698 + ... + 8150778.

It is an arithmetic number, because the mean of its divisors is an integer number (1895249524086).

Almost surely, 2^{27796666664778} is an apocalyptic number.

27796666664778 is an abundant number, since it is smaller than the sum of its proper divisors (32851318105974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27796666664778 is a wasteful number, since it uses less digits than its factorization.

27796666664778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944790.

The product of its digits is 64524128256, while the sum is 87.

The spelling of 27796666664778 in words is "twenty-seven trillion, seven hundred ninety-six billion, six hundred sixty-six million, six hundred sixty-four thousand, seven hundred seventy-eight".