12826666 has 4 divisors (see below), whose sum is σ = 19240002. Its totient is φ = 6413332.

The previous prime is 12826651. The next prime is 12826669. The reversal of 12826666 is 66662821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66662821 = 7559 ⋅8819.

It can be written as a sum of positive squares in only one way, i.e., 8910225 + 3916441 = 2985^2 + 1979^2 .

12826666 is a modest number, since divided by 6666 gives 1282 as remainder.

It is not an unprimeable number, because it can be changed into a prime (12826669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3206665 + ... + 3206668.

Almost surely, 2^12826666 is an apocalyptic number.

12826666 is a deficient number, since it is larger than the sum of its proper divisors (6413336).

12826666 is an equidigital number, since it uses as much as digits as its factorization.

12826666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6413335.

The product of its digits is 41472, while the sum is 37.

The square root of 12826666 is about 3581.4335118776. The cubic root of 12826666 is about 234.0837477525.

The spelling of 12826666 in words is "twelve million, eight hundred twenty-six thousand, six hundred sixty-six".