2566771 has 2 divisors, whose sum is σ = 2566772. Its totient is φ = 2566770.

The previous prime is 2566757. The next prime is 2566783. The reversal of 2566771 is 1776652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2566771 - 2⁹ = 2566259 is a prime.

It is not a weakly prime, because it can be changed into another prime (2566171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283385 + 1283386.

It is an arithmetic number, because the mean of its divisors is an integer number (1283386).

2^2566771 is an apocalyptic number.

2566771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566771 is an equidigital number, since it uses as much as digits as its factorization.

2566771 is an evil number, because the sum of its binary digits is even.

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

The square root of 2566771 is about 1602.1145402249. The cubic root of 2566771 is about 136.9185762993.

The spelling of 2566771 in words is "two million, five hundred sixty-six thousand, seven hundred seventy-one".