1566443441 has 4 divisors (see below), whose sum is σ = 1581952884. Its totient is φ = 1550934000.

The previous prime is 1566443419. The next prime is 1566443443. The reversal of 1566443441 is 1443446651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 998812816 + 567630625 = 31604^2 + 23825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1566443441 - 2¹⁰ = 1566442417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1566443395 and 1566443404.

It is not an unprimeable number, because it can be changed into a prime (1566443443) 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 in 3 ways as a sum of consecutive naturals, for example, 7754570 + ... + 7754771.

It is an arithmetic number, because the mean of its divisors is an integer number (395488221).

Almost surely, 2^1566443441 is an apocalyptic number.

It is an amenable number.

1566443441 is a deficient number, since it is larger than the sum of its proper divisors (15509443).

1566443441 is a wasteful number, since it uses less digits than its factorization.

1566443441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15509442.

The product of its digits is 138240, while the sum is 38.

The square root of 1566443441 is about 39578.3203408128. The cubic root of 1566443441 is about 1161.3725926618.

The spelling of 1566443441 in words is "one billion, five hundred sixty-six million, four hundred forty-three thousand, four hundred forty-one".