12662266 has 4 divisors (see below), whose sum is σ = 18993402. Its totient is φ = 6331132.

The previous prime is 12662257. The next prime is 12662267. The reversal of 12662266 is 66226621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66226621 = 2069 ⋅32009.

It can be written as a sum of positive squares in only one way, i.e., 11799225 + 863041 = 3435^2 + 929^2 .

It is not an unprimeable number, because it can be changed into a prime (12662267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165565 + ... + 3165568.

Almost surely, 2^12662266 is an apocalyptic number.

12662266 is a deficient number, since it is larger than the sum of its proper divisors (6331136).

12662266 is an equidigital number, since it uses as much as digits as its factorization.

12662266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331135.

The product of its digits is 10368, while the sum is 31.

The square root of 12662266 is about 3558.4077900095. The cubic root of 12662266 is about 233.0793567607.

Adding to 12662266 its reverse (66226621), we get a palindrome (78888887).

The spelling of 12662266 in words is "twelve million, six hundred sixty-two thousand, two hundred sixty-six".