2166323240563 has 8 divisors (see below), whose sum is σ = 2262471782688. Its totient is φ = 2070338079744.

The previous prime is 2166323240551. The next prime is 2166323240647. The reversal of 2166323240563 is 3650423236612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2166323240563 - 2³⁷ = 2028884287091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166323220563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40818220 + ... + 40871257.

It is an arithmetic number, because the mean of its divisors is an integer number (282808972836).

Almost surely, 2^{2166323240563} is an apocalyptic number.

2166323240563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2166323240563 is a deficient number, since it is larger than the sum of its proper divisors (96148542125).

2166323240563 is a wasteful number, since it uses less digits than its factorization.

2166323240563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81690653.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 2166323240563 in words is "two trillion, one hundred sixty-six billion, three hundred twenty-three million, two hundred forty thousand, five hundred sixty-three".