27765664 has 12 divisors (see below), whose sum is σ = 54663714. Its totient is φ = 13882816.

The previous prime is 27765643. The next prime is 27765691. The reversal of 27765664 is 46656772.

It can be written as a sum of positive squares in only one way, i.e., 16875664 + 10890000 = 4108^2 + 3300^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 27765664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433807 + ... + 433870.

Almost surely, 2^27765664 is an apocalyptic number.

It is an amenable number.

27765664 is a deficient number, since it is larger than the sum of its proper divisors (26898050).

27765664 is an equidigital number, since it uses as much as digits as its factorization.

27765664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867687 (or 867679 counting only the distinct ones).

The product of its digits is 423360, while the sum is 43.

The square root of 27765664 is about 5269.3134277627. The cubic root of 27765664 is about 302.8094013474.

The spelling of 27765664 in words is "twenty-seven million, seven hundred sixty-five thousand, six hundred sixty-four".