12666346 has 32 divisors (see below), whose sum is σ = 23856768. Its totient is φ = 4899840.

The previous prime is 12666299. The next prime is 12666347. The reversal of 12666346 is 64366621.

It is not an unprimeable number, because it can be changed into a prime (12666347) 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 in 15 ways as a sum of consecutive naturals, for example, 35706 + ... + 36058.

It is an arithmetic number, because the mean of its divisors is an integer number (745524).

Almost surely, 2^12666346 is an apocalyptic number.

12666346 is a deficient number, since it is larger than the sum of its proper divisors (11190422).

12666346 is a wasteful number, since it uses less digits than its factorization.

12666346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its digits is 31104, while the sum is 34.

The square root of 12666346 is about 3558.9810339478. The cubic root of 12666346 is about 233.1043881323.

It can be divided in two parts, 1266 and 6346, that multiplied together give a triangular number (8034036 = T₄₀₀₈).

The spelling of 12666346 in words is "twelve million, six hundred sixty-six thousand, three hundred forty-six".