1566906941 has 2 divisors, whose sum is σ = 1566906942. Its totient is φ = 1566906940.

The previous prime is 1566906931. The next prime is 1566906961. The reversal of 1566906941 is 1496096651.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1355786041 + 211120900 = 36821^2 + 14530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1566906941 - 2¹⁰ = 1566905917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1566906911) 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, 783453470 + 783453471.

It is an arithmetic number, because the mean of its divisors is an integer number (783453471).

Almost surely, 2^1566906941 is an apocalyptic number.

It is an amenable number.

1566906941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566906941 is an equidigital number, since it uses as much as digits as its factorization.

1566906941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 1566906941 is about 39584.1753861313. The cubic root of 1566906941 is about 1161.4871287926.

The spelling of 1566906941 in words is "one billion, five hundred sixty-six million, nine hundred six thousand, nine hundred forty-one".