2666317 has 4 divisors (see below), whose sum is σ = 2671516. Its totient is φ = 2661120.

The previous prime is 2666309. The next prime is 2666381. The reversal of 2666317 is 7136662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2056356 + 609961 = 1434^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2666317 - 2³ = 2666309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734 + ... + 2887.

It is an arithmetic number, because the mean of its divisors is an integer number (667879).

2^2666317 is an apocalyptic number.

It is an amenable number.

2666317 is a deficient number, since it is larger than the sum of its proper divisors (5199).

2666317 is an equidigital number, since it uses as much as digits as its factorization.

2666317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5198.

The product of its digits is 9072, while the sum is 31.

The square root of 2666317 is about 1632.8860952314. The cubic root of 2666317 is about 138.6661934720. Note that the first 3 decimals are identical.

The spelling of 2666317 in words is "two million, six hundred sixty-six thousand, three hundred seventeen".