2166495783 has 4 divisors (see below), whose sum is σ = 2888661048. Its totient is φ = 1444330520.

The previous prime is 2166495733. The next prime is 2166495803. The reversal of 2166495783 is 3875946612.

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 2166495783 - 2¹² = 2166491687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166495733) 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, 361082628 + ... + 361082633.

It is an arithmetic number, because the mean of its divisors is an integer number (722165262).

Almost surely, 2^2166495783 is an apocalyptic number.

2166495783 is a deficient number, since it is larger than the sum of its proper divisors (722165265).

2166495783 is an equidigital number, since it uses as much as digits as its factorization.

2166495783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722165264.

The product of its digits is 2177280, while the sum is 51.

The square root of 2166495783 is about 46545.6311913374. The cubic root of 2166495783 is about 1293.9553265005.

The spelling of 2166495783 in words is "two billion, one hundred sixty-six million, four hundred ninety-five thousand, seven hundred eighty-three".