2666384473 has 4 divisors (see below), whose sum is σ = 2716693668. Its totient is φ = 2616075280.

The previous prime is 2666384459. The next prime is 2666384489. The reversal of 2666384473 is 3744836662.

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

It can be written as a sum of positive squares in 2 ways, for example, as 776569689 + 1889814784 = 27867^2 + 43472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666384473 - 2²¹ = 2664287321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666384453) 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, 25154518 + ... + 25154623.

It is an arithmetic number, because the mean of its divisors is an integer number (679173417).

Almost surely, 2^2666384473 is an apocalyptic number.

It is an amenable number.

2666384473 is a deficient number, since it is larger than the sum of its proper divisors (50309195).

2666384473 is an equidigital number, since it uses as much as digits as its factorization.

2666384473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50309194.

The product of its digits is 3483648, while the sum is 49.

The square root of 2666384473 is about 51637.0455487143. The cubic root of 2666384473 is about 1386.6736314356.

The spelling of 2666384473 in words is "two billion, six hundred sixty-six million, three hundred eighty-four thousand, four hundred seventy-three".