1566336841 has 2 divisors, whose sum is σ = 1566336842. Its totient is φ = 1566336840.

The previous prime is 1566336829. The next prime is 1566336851. The reversal of 1566336841 is 1486336651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1401753600 + 164583241 = 37440^2 + 12829^2 .

It is an emirp because it is prime and its reverse (1486336651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1566336841 - 2⁵ = 1566336809 is a prime.

It is a super-2 number, since 2×1566336841² = 4906822198947718562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1566336851) 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, 783168420 + 783168421.

It is an arithmetic number, because the mean of its divisors is an integer number (783168421).

Almost surely, 2^1566336841 is an apocalyptic number.

It is an amenable number.

1566336841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566336841 is an equidigital number, since it uses as much as digits as its factorization.

1566336841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 1566336841 is about 39576.9736210337. The cubic root of 1566336841 is about 1161.3462473916.

The spelling of 1566336841 in words is "one billion, five hundred sixty-six million, three hundred thirty-six thousand, eight hundred forty-one".