1566416053 has 4 divisors (see below), whose sum is σ = 1608751660. Its totient is φ = 1524080448.

The previous prime is 1566416039. The next prime is 1566416077. The reversal of 1566416053 is 3506146651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3506146651 = 7 ⋅500878093.

It can be written as a sum of positive squares in 2 ways, for example, as 1488570724 + 77845329 = 38582^2 + 8823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1566416053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 42335569 = 1566416053 / (1 + 5 + 6 + 6 + 4 + 1 + 6 + 0 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566416653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21167748 + ... + 21167821.

It is an arithmetic number, because the mean of its divisors is an integer number (402187915).

Almost surely, 2^1566416053 is an apocalyptic number.

It is an amenable number.

1566416053 is a deficient number, since it is larger than the sum of its proper divisors (42335607).

1566416053 is an equidigital number, since it uses as much as digits as its factorization.

1566416053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42335606.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1566416053 is about 39577.9743417977. The cubic root of 1566416053 is about 1161.3658240680.

The spelling of 1566416053 in words is "one billion, five hundred sixty-six million, four hundred sixteen thousand, fifty-three".