1566329449 has 2 divisors, whose sum is σ = 1566329450. Its totient is φ = 1566329448.

The previous prime is 1566329441. The next prime is 1566329483. The reversal of 1566329449 is 9449236651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 926593600 + 639735849 = 30440^2 + 25293^2 .

It is a cyclic number.

It is not a de Polignac number, because 1566329449 - 2³ = 1566329441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1566329441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 783164724 + 783164725.

It is an arithmetic number, because the mean of its divisors is an integer number (783164725).

Almost surely, 2^1566329449 is an apocalyptic number.

It is an amenable number.

1566329449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1566329449 is an equidigital number, since it uses as much as digits as its factorization.

1566329449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The square root of 1566329449 is about 39576.8802332877. The cubic root of 1566329449 is about 1161.3444204783.

The spelling of 1566329449 in words is "one billion, five hundred sixty-six million, three hundred twenty-nine thousand, four hundred forty-nine".