27765081 has 6 divisors (see below), whose sum is σ = 40105130. Its totient is φ = 18510048.

The previous prime is 27765053. The next prime is 27765083. The reversal of 27765081 is 18056772.

It can be written as a sum of positive squares in only one way, i.e., 16475481 + 11289600 = 4059^2 + 3360^2 .

It is not a de Polignac number, because 27765081 - 2⁷ = 27764953 is a prime.

It is a super-2 number, since 2×27765081² = 1541799445873122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27765083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1542496 + ... + 1542513.

Almost surely, 2^27765081 is an apocalyptic number.

It is an amenable number.

27765081 is a deficient number, since it is larger than the sum of its proper divisors (12340049).

27765081 is a wasteful number, since it uses less digits than its factorization.

27765081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085015 (or 3085012 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 27765081 is about 5269.2581071722. The cubic root of 27765081 is about 302.8072819537.

The spelling of 27765081 in words is "twenty-seven million, seven hundred sixty-five thousand, eighty-one".