27442744666 has 24 divisors (see below), whose sum is σ = 43845549660. Its totient is φ = 12879508992.

The previous prime is 27442744663. The next prime is 27442744687. The reversal of 27442744666 is 66644724472.

It can be written as a sum of positive squares in 6 ways, for example, as 16389376441 + 11053368225 = 128021^2 + 105135^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (27442744663) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 151950 + ... + 279238.

Almost surely, 2^27442744666 is an apocalyptic number.

27442744666 is a deficient number, since it is larger than the sum of its proper divisors (16402804994).

27442744666 is a wasteful number, since it uses less digits than its factorization.

27442744666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127698 (or 127681 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 52.

The spelling of 27442744666 in words is "twenty-seven billion, four hundred forty-two million, seven hundred forty-four thousand, six hundred sixty-six".