2666539 has 2 divisors, whose sum is σ = 2666540. Its totient is φ = 2666538.

The previous prime is 2666537. The next prime is 2666561. The reversal of 2666539 is 9356662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666539 - 2¹ = 2666537 is a prime.

It is a super-2 number, since 2×2666539² = 14220860477042, which contains 22 as substring.

Together with 2666537, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2666498 and 2666507.

It is not a weakly prime, because it can be changed into another prime (2666537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333269 + 1333270.

It is an arithmetic number, because the mean of its divisors is an integer number (1333270).

2^2666539 is an apocalyptic number.

2666539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666539 is an equidigital number, since it uses as much as digits as its factorization.

2666539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

The square root of 2666539 is about 1632.9540716138. The cubic root of 2666539 is about 138.6700418567.

It can be divided in two parts, 266653 and 9, that added together give a palindrome (266662).

The spelling of 2666539 in words is "two million, six hundred sixty-six thousand, five hundred thirty-nine".