1566255413 has 2 divisors, whose sum is σ = 1566255414. Its totient is φ = 1566255412.

The previous prime is 1566255323. The next prime is 1566255421. The reversal of 1566255413 is 3145526651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1530530884 + 35724529 = 39122^2 + 5977^2 .

It is an emirp because it is prime and its reverse (3145526651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1566255413 - 2⁸ = 1566255157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1566255463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783127706 + 783127707.

It is an arithmetic number, because the mean of its divisors is an integer number (783127707).

Almost surely, 2^1566255413 is an apocalyptic number.

It is an amenable number.

1566255413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566255413 is an equidigital number, since it uses as much as digits as its factorization.

1566255413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 38.

The square root of 1566255413 is about 39575.9448781706. The cubic root of 1566255413 is about 1161.3261223588.

The spelling of 1566255413 in words is "one billion, five hundred sixty-six million, two hundred fifty-five thousand, four hundred thirteen".