2166752563 has 4 divisors (see below), whose sum is σ = 2167287840. Its totient is φ = 2166217288.

The previous prime is 2166752557. The next prime is 2166752579. The reversal of 2166752563 is 3652576612.

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

It is a cyclic number.

It is not a de Polignac number, because 2166752563 - 2⁵ = 2166752531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166252563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261520 + ... + 269677.

It is an arithmetic number, because the mean of its divisors is an integer number (541821960).

Almost surely, 2^2166752563 is an apocalyptic number.

2166752563 is a deficient number, since it is larger than the sum of its proper divisors (535277).

2166752563 is an equidigital number, since it uses as much as digits as its factorization.

2166752563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535276.

The product of its digits is 453600, while the sum is 43.

The square root of 2166752563 is about 46548.3894780475. The cubic root of 2166752563 is about 1294.0064457204.

The spelling of 2166752563 in words is "two billion, one hundred sixty-six million, seven hundred fifty-two thousand, five hundred sixty-three".