27738666 has 16 divisors (see below), whose sum is σ = 61641600. Its totient is φ = 9246204.

The previous prime is 27738661. The next prime is 27738671. The reversal of 27738666 is 66683772.

It is an interprime number because it is at equal distance from previous prime (27738661) and next prime (27738671).

It is not an unprimeable number, because it can be changed into a prime (27738661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256786 + ... + 256893.

It is an arithmetic number, because the mean of its divisors is an integer number (3852600).

Almost surely, 2^27738666 is an apocalyptic number.

27738666 is an abundant number, since it is smaller than the sum of its proper divisors (33902934).

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

27738666 is a wasteful number, since it uses less digits than its factorization.

27738666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513690 (or 513684 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 27738666 is about 5266.7509908861. The cubic root of 27738666 is about 302.7112237399.

The spelling of 27738666 in words is "twenty-seven million, seven hundred thirty-eight thousand, six hundred sixty-six".