2665771 has 2 divisors, whose sum is σ = 2665772. Its totient is φ = 2665770.

The previous prime is 2665763. The next prime is 2665781. The reversal of 2665771 is 1775662.

2665771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2665771 - 2³ = 2665763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2665781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332885 + 1332886.

It is an arithmetic number, because the mean of its divisors is an integer number (1332886).

2^2665771 is an apocalyptic number.

2665771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665771 is an equidigital number, since it uses as much as digits as its factorization.

2665771 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2665771 is about 1632.7188980348. The cubic root of 2665771 is about 138.6567276171.

The spelling of 2665771 in words is "two million, six hundred sixty-five thousand, seven hundred seventy-one".