2666291 has 2 divisors, whose sum is σ = 2666292. Its totient is φ = 2666290.

The previous prime is 2666281. The next prime is 2666303. The reversal of 2666291 is 1926662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666291 - 2⁶ = 2666227 is a prime.

It is equal to p₁₉₄₃₇₈ and since 2666291 and 194378 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 polite number, since it can be written as a sum of consecutive naturals, namely, 1333145 + 1333146.

It is an arithmetic number, because the mean of its divisors is an integer number (1333146).

2^2666291 is an apocalyptic number.

2666291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666291 is an equidigital number, since it uses as much as digits as its factorization.

2666291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 2666291 is about 1632.8781338483. The cubic root of 2666291 is about 138.6657427464.

It can be divided in two parts, 26662 and 91, that multiplied together give a palindrome (2426242).

The spelling of 2666291 in words is "two million, six hundred sixty-six thousand, two hundred ninety-one".