2066544643 has 2 divisors, whose sum is σ = 2066544644. Its totient is φ = 2066544642.

The previous prime is 2066544637. The next prime is 2066544721. The reversal of 2066544643 is 3464456602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2066544643 - 2²⁹ = 1529673731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2066544596 and 2066544605.

It is not a weakly prime, because it can be changed into another prime (2066544143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033272321 + 1033272322.

It is an arithmetic number, because the mean of its divisors is an integer number (1033272322).

Almost surely, 2^2066544643 is an apocalyptic number.

2066544643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066544643 is an equidigital number, since it uses as much as digits as its factorization.

2066544643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 40.

The square root of 2066544643 is about 45459.2635554075. The cubic root of 2066544643 is about 1273.7423750436.

The spelling of 2066544643 in words is "two billion, sixty-six million, five hundred forty-four thousand, six hundred forty-three".