260566639 has 2 divisors, whose sum is σ = 260566640. Its totient is φ = 260566638.

The previous prime is 260566529. The next prime is 260566651. The reversal of 260566639 is 936665062.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260566639 - 2¹⁹ = 260042351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 260566595 and 260566604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260566039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130283319 + 130283320.

It is an arithmetic number, because the mean of its divisors is an integer number (130283320).

Almost surely, 2^260566639 is an apocalyptic number.

260566639 is a deficient number, since it is larger than the sum of its proper divisors (1).

260566639 is an equidigital number, since it uses as much as digits as its factorization.

260566639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 260566639 is about 16142.0766631806. The cubic root of 260566639 is about 638.7137570310.

The spelling of 260566639 in words is "two hundred sixty million, five hundred sixty-six thousand, six hundred thirty-nine".