2665436539 has 2 divisors, whose sum is σ = 2665436540. Its totient is φ = 2665436538.

The previous prime is 2665436533. The next prime is 2665436573. The reversal of 2665436539 is 9356345662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2665436539 - 2⁹ = 2665436027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2665436492 and 2665436501.

It is not a weakly prime, because it can be changed into another prime (2665436533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332718269 + 1332718270.

It is an arithmetic number, because the mean of its divisors is an integer number (1332718270).

Almost surely, 2^2665436539 is an apocalyptic number.

2665436539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665436539 is an equidigital number, since it uses as much as digits as its factorization.

2665436539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 49.

The square root of 2665436539 is about 51627.8659156080. The cubic root of 2665436539 is about 1386.5092851836.

The spelling of 2665436539 in words is "two billion, six hundred sixty-five million, four hundred thirty-six thousand, five hundred thirty-nine".