2666791 has 2 divisors, whose sum is σ = 2666792. Its totient is φ = 2666790.

The previous prime is 2666779. The next prime is 2666809. The reversal of 2666791 is 1976662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666791 - 2⁷ = 2666663 is a prime.

It is a super-2 number, since 2×2666791² = 14223548475362, which contains 22 as substring.

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 2666791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333395 + 1333396.

It is an arithmetic number, because the mean of its divisors is an integer number (1333396).

2^2666791 is an apocalyptic number.

2666791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666791 is an equidigital number, since it uses as much as digits as its factorization.

2666791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 2666791 is about 1633.0312305648. The cubic root of 2666791 is about 138.6744100346.

The spelling of 2666791 in words is "two million, six hundred sixty-six thousand, seven hundred ninety-one".