12666328 has 8 divisors (see below), whose sum is σ = 23749380. Its totient is φ = 6333160.

The previous prime is 12666299. The next prime is 12666347. The reversal of 12666328 is 82366621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12666293 and 12666302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791638 + ... + 791653.

Almost surely, 2^12666328 is an apocalyptic number.

It is an amenable number.

12666328 is a deficient number, since it is larger than the sum of its proper divisors (11083052).

12666328 is a wasteful number, since it uses less digits than its factorization.

12666328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583297 (or 1583293 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 12666328 is about 3558.9785051332. The cubic root of 12666328 is about 233.1042777116.

The spelling of 12666328 in words is "twelve million, six hundred sixty-six thousand, three hundred twenty-eight".