2566687 has 2 divisors, whose sum is σ = 2566688. Its totient is φ = 2566686.

The previous prime is 2566679. The next prime is 2566699. The reversal of 2566687 is 7866652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2566687 - 2³ = 2566679 is a prime.

2566687 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283343 + 1283344.

It is an arithmetic number, because the mean of its divisors is an integer number (1283344).

2^2566687 is an apocalyptic number.

2566687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566687 is an equidigital number, since it uses as much as digits as its factorization.

2566687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 2566687 is about 1602.0883246563. The cubic root of 2566687 is about 136.9170826865.

The spelling of 2566687 in words is "two million, five hundred sixty-six thousand, six hundred eighty-seven".