2566783 has 2 divisors, whose sum is σ = 2566784. Its totient is φ = 2566782.

The previous prime is 2566771. The next prime is 2566787. The reversal of 2566783 is 3876652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2566783 - 2¹⁷ = 2435711 is a prime.

It is equal to p₁₈₇₅₉₇ and since 2566783 and 187597 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283391 + 1283392.

It is an arithmetic number, because the mean of its divisors is an integer number (1283392).

2^2566783 is an apocalyptic number.

2566783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566783 is an equidigital number, since it uses as much as digits as its factorization.

2566783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 2566783 is about 1602.1182852711. The cubic root of 2566783 is about 136.9187896699.

The spelling of 2566783 in words is "two million, five hundred sixty-six thousand, seven hundred eighty-three".