2666289 has 16 divisors (see below), whose sum is σ = 3873600. Its totient is φ = 1624896.

The previous prime is 2666281. The next prime is 2666291. The reversal of 2666289 is 9826662.

2666289 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 2666289 - 2³ = 2666281 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 6³ + 6⁷ + 6⁷ + 2¹³ + 8⁷ + 9³ .

It is not an unprimeable number, because it can be changed into a prime (2666281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847 + ... + 2459.

It is an arithmetic number, because the mean of its divisors is an integer number (242100).

2^2666289 is an apocalyptic number.

2666289 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2666289 is a deficient number, since it is larger than the sum of its proper divisors (1207311).

2666289 is a wasteful number, since it uses less digits than its factorization.

2666289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664.

The product of its digits is 62208, while the sum is 39.

The square root of 2666289 is about 1632.8775214326. The cubic root of 2666289 is about 138.6657080750.

It can be divided in two parts, 266 and 6289, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 2666289 in words is "two million, six hundred sixty-six thousand, two hundred eighty-nine".