271075661 has 2 divisors, whose sum is σ = 271075662. Its totient is φ = 271075660.

The previous prime is 271075627. The next prime is 271075663. The reversal of 271075661 is 166570172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170955625 + 100120036 = 13075^2 + 10006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-271075661 is a prime.

Together with 271075663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (271075663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135537830 + 135537831.

It is an arithmetic number, because the mean of its divisors is an integer number (135537831).

Almost surely, 2^271075661 is an apocalyptic number.

It is an amenable number.

271075661 is a deficient number, since it is larger than the sum of its proper divisors (1).

271075661 is an equidigital number, since it uses as much as digits as its factorization.

271075661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 271075661 is about 16464.3755119956. The cubic root of 271075661 is about 647.1875813276.

It can be divided in two parts, 27107 and 5661, that added together give a 15-th power (32768 = 2¹⁵).

The spelling of 271075661 in words is "two hundred seventy-one million, seventy-five thousand, six hundred sixty-one".