660271 has 2 divisors, whose sum is σ = 660272. Its totient is φ = 660270.

The previous prime is 660251. The next prime is 660277. The reversal of 660271 is 172066.

660271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660271 - 2⁹ = 659759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330135 + 330136.

It is an arithmetic number, because the mean of its divisors is an integer number (330136).

2⁶⁶⁰²⁷¹ is an apocalyptic number.

660271 is a deficient number, since it is larger than the sum of its proper divisors (1).

660271 is an equidigital number, since it uses as much as digits as its factorization.

660271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 660271 is about 812.5706123162. The cubic root of 660271 is about 87.0777918733.

The spelling of 660271 in words is "six hundred sixty thousand, two hundred seventy-one".