2666305543 has 12 divisors (see below), whose sum is σ = 2932837264. Its totient is φ = 2422173600.

The previous prime is 2666305519. The next prime is 2666305597. The reversal of 2666305543 is 3455036662.

2666305543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2666305543 - 2²⁵ = 2632751111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2666305496 and 2666305505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666305513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179563 + ... + 193843.

Almost surely, 2^2666305543 is an apocalyptic number.

2666305543 is a deficient number, since it is larger than the sum of its proper divisors (266531721).

2666305543 is a wasteful number, since it uses less digits than its factorization.

2666305543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15846 (or 15835 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 40.

The square root of 2666305543 is about 51636.2812661795. The cubic root of 2666305543 is about 1386.6599485840.

The spelling of 2666305543 in words is "two billion, six hundred sixty-six million, three hundred five thousand, five hundred forty-three".