260664641 has 2 divisors, whose sum is σ = 260664642. Its totient is φ = 260664640.

The previous prime is 260664601. The next prime is 260664659. The reversal of 260664641 is 146466062.

260664641 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 can be written as a sum of positive squares in only one way, i.e., 139334416 + 121330225 = 11804^2 + 11015^2 .

It is a cyclic number.

It is not a de Polignac number, because 260664641 - 2¹⁰ = 260663617 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (260664601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130332320 + 130332321.

It is an arithmetic number, because the mean of its divisors is an integer number (130332321).

Almost surely, 2^260664641 is an apocalyptic number.

It is an amenable number.

260664641 is a deficient number, since it is larger than the sum of its proper divisors (1).

260664641 is an equidigital number, since it uses as much as digits as its factorization.

260664641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 260664641 is about 16145.1119847463. Note that the first 3 decimals coincide. The cubic root of 260664641 is about 638.7938227676.

The spelling of 260664641 in words is "two hundred sixty million, six hundred sixty-four thousand, six hundred forty-one".