1566050663 has 4 divisors (see below), whose sum is σ = 1620052440. Its totient is φ = 1512048888.

The previous prime is 1566050639. The next prime is 1566050767. The reversal of 1566050663 is 3660506651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3660506651 = 15131 ⋅241921.

It is a cyclic number.

It is not a de Polignac number, because 1566050663 - 2¹² = 1566046567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566050363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27000845 + ... + 27000902.

It is an arithmetic number, because the mean of its divisors is an integer number (405013110).

Almost surely, 2^1566050663 is an apocalyptic number.

1566050663 is a deficient number, since it is larger than the sum of its proper divisors (54001777).

1566050663 is an equidigital number, since it uses as much as digits as its factorization.

1566050663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54001776.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 1566050663 is about 39573.3579949946. The cubic root of 1566050663 is about 1161.2755150561.

The spelling of 1566050663 in words is "one billion, five hundred sixty-six million, fifty thousand, six hundred sixty-three".