27661057 has 6 divisors (see below), whose sum is σ = 29384198. Its totient is φ = 26033664.

The previous prime is 27661037. The next prime is 27661063. The reversal of 27661057 is 75016672.

It can be written as a sum of positive squares in 3 ways, for example, as 11669056 + 15992001 = 3416^2 + 3999^2 .

It is not a de Polignac number, because 27661057 - 2⁷ = 27660929 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27661037) 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, 47568 + ... + 48145.

Almost surely, 2^27661057 is an apocalyptic number.

It is an amenable number.

27661057 is a deficient number, since it is larger than the sum of its proper divisors (1723141).

27661057 is an equidigital number, since it uses as much as digits as its factorization.

27661057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95747 (or 95730 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 27661057 is about 5259.3780050496. The cubic root of 27661057 is about 302.4286451465.

The spelling of 27661057 in words is "twenty-seven million, six hundred sixty-one thousand, fifty-seven".