2168266 has 4 divisors (see below), whose sum is σ = 3252402. Its totient is φ = 1084132.

The previous prime is 2168263. The next prime is 2168273. The reversal of 2168266 is 6628612.

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

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 137641 = 1425^2 + 371^2 .

It is not an unprimeable number, because it can be changed into a prime (2168263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542065 + ... + 542068.

2^2168266 is an apocalyptic number.

2168266 is a deficient number, since it is larger than the sum of its proper divisors (1084136).

2168266 is a wasteful number, since it uses less digits than its factorization.

2168266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084135.

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

The square root of 2168266 is about 1472.5033106924. The cubic root of 2168266 is about 129.4307655539.

The spelling of 2168266 in words is "two million, one hundred sixty-eight thousand, two hundred sixty-six".