2566997 has 2 divisors, whose sum is σ = 2566998. Its totient is φ = 2566996.

The previous prime is 2566981. The next prime is 2567009. The reversal of 2566997 is 7996652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2208196 + 358801 = 1486^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566997 - 2⁴ = 2566981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283498 + 1283499.

It is an arithmetic number, because the mean of its divisors is an integer number (1283499).

2^2566997 is an apocalyptic number.

It is an amenable number.

2566997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566997 is an equidigital number, since it uses as much as digits as its factorization.

2566997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 44.

The square root of 2566997 is about 1602.1850704585. The cubic root of 2566997 is about 136.9225946671.

The spelling of 2566997 in words is "two million, five hundred sixty-six thousand, nine hundred ninety-seven".