2566553477 has 2 divisors, whose sum is σ = 2566553478. Its totient is φ = 2566553476.

The previous prime is 2566553449. The next prime is 2566553489. The reversal of 2566553477 is 7743556652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2519136481 + 47416996 = 50191^2 + 6886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566553477 - 2⁸ = 2566553221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2566553177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283276738 + 1283276739.

It is an arithmetic number, because the mean of its divisors is an integer number (1283276739).

Almost surely, 2^2566553477 is an apocalyptic number.

It is an amenable number.

2566553477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566553477 is an equidigital number, since it uses as much as digits as its factorization.

2566553477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292000, while the sum is 50.

The square root of 2566553477 is about 50661.1633995904. The cubic root of 2566553477 is about 1369.1470843303.

The spelling of 2566553477 in words is "two billion, five hundred sixty-six million, five hundred fifty-three thousand, four hundred seventy-seven".