2066547281 has 2 divisors, whose sum is σ = 2066547282. Its totient is φ = 2066547280.

The previous prime is 2066547271. The next prime is 2066547317. The reversal of 2066547281 is 1827456602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1870995025 + 195552256 = 43255^2 + 13984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2066547281 is a prime.

It is a super-2 number, since 2×2066547281² = 8541235329216985922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2066547211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033273640 + 1033273641.

It is an arithmetic number, because the mean of its divisors is an integer number (1033273641).

Almost surely, 2^2066547281 is an apocalyptic number.

It is an amenable number.

2066547281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2066547281 is an equidigital number, since it uses as much as digits as its factorization.

2066547281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 2066547281 is about 45459.2925703865. The cubic root of 2066547281 is about 1273.7429170322.

The spelling of 2066547281 in words is "two billion, sixty-six million, five hundred forty-seven thousand, two hundred eighty-one".