2666281 has 2 divisors, whose sum is σ = 2666282. Its totient is φ = 2666280.

The previous prime is 2666273. The next prime is 2666291. The reversal of 2666281 is 1826662.

2666281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2374681 + 291600 = 1541^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666281 - 2³ = 2666273 is a prime.

It is a super-2 number, since 2×2666281² = 14218108741922, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₉₄₃₇₇ and since 2666281 and 194377 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2666201) 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 as a sum of consecutive naturals, namely, 1333140 + 1333141.

It is an arithmetic number, because the mean of its divisors is an integer number (1333141).

2^2666281 is an apocalyptic number.

It is an amenable number.

2666281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666281 is an equidigital number, since it uses as much as digits as its factorization.

2666281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 2666281 is about 1632.8750717676. The cubic root of 2666281 is about 138.6655693895.

The spelling of 2666281 in words is "two million, six hundred sixty-six thousand, two hundred eighty-one".