2566787 has 2 divisors, whose sum is σ = 2566788. Its totient is φ = 2566786.

The previous prime is 2566783. The next prime is 2566807. The reversal of 2566787 is 7876652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2566787 - 2² = 2566783 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁵ + 5³ + 6⁶ + 6⁸ + 7⁵ + 8 + 7⁷ .

It is not a weakly prime, because it can be changed into another prime (2566783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283393 + 1283394.

It is an arithmetic number, because the mean of its divisors is an integer number (1283394).

2^2566787 is an apocalyptic number.

2566787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566787 is an equidigital number, since it uses as much as digits as its factorization.

2566787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 2566787 is about 1602.1195336179. The cubic root of 2566787 is about 136.9188607933.

The spelling of 2566787 in words is "two million, five hundred sixty-six thousand, seven hundred eighty-seven".