2666439089 has 2 divisors, whose sum is σ = 2666439090. Its totient is φ = 2666439088.

The previous prime is 2666439031. The next prime is 2666439091. The reversal of 2666439089 is 9809346662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1853733025 + 812706064 = 43055^2 + 28508^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666439089 - 2⁸ = 2666438833 is a prime.

Together with 2666439091, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2666439089.

It is not a weakly prime, because it can be changed into another prime (2666439019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333219544 + 1333219545.

It is an arithmetic number, because the mean of its divisors is an integer number (1333219545).

Almost surely, 2^2666439089 is an apocalyptic number.

It is an amenable number.

2666439089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666439089 is an equidigital number, since it uses as much as digits as its factorization.

2666439089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The square root of 2666439089 is about 51637.5743911350. The cubic root of 2666439089 is about 1386.6830991938.

The spelling of 2666439089 in words is "two billion, six hundred sixty-six million, four hundred thirty-nine thousand, eighty-nine".