27843479666 has 4 divisors (see below), whose sum is σ = 41765219502. Its totient is φ = 13921739832.

The previous prime is 27843479581. The next prime is 27843479731. The reversal of 27843479666 is 66697434872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27743899225 + 99580441 = 166565^2 + 9979^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27843479599 and 27843479608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960869915 + ... + 6960869918.

Almost surely, 2^27843479666 is an apocalyptic number.

27843479666 is a deficient number, since it is larger than the sum of its proper divisors (13921739836).

27843479666 is a wasteful number, since it uses less digits than its factorization.

27843479666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13921739835.

The product of its digits is 73156608, while the sum is 62.

The spelling of 27843479666 in words is "twenty-seven billion, eight hundred forty-three million, four hundred seventy-nine thousand, six hundred sixty-six".