12667866 has 8 divisors (see below), whose sum is σ = 25335744. Its totient is φ = 4222620.

The previous prime is 12667861. The next prime is 12667877. The reversal of 12667866 is 66876621.

It is a happy number.

12667866 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12667866 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12667861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055650 + ... + 1055661.

It is an arithmetic number, because the mean of its divisors is an integer number (3166968).

Almost surely, 2^12667866 is an apocalyptic number.

12667866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12667866 is a wasteful number, since it uses less digits than its factorization.

12667866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111316.

The product of its digits is 145152, while the sum is 42.

The square root of 12667866 is about 3559.1945718098. The cubic root of 12667866 is about 233.1137121709.

The spelling of 12667866 in words is "twelve million, six hundred sixty-seven thousand, eight hundred sixty-six".