12666670 has 16 divisors (see below), whose sum is σ = 22845888. Its totient is φ = 5056480.

The previous prime is 12666607. The next prime is 12666671. The reversal of 12666670 is 7666621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666671) 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 7 ways as a sum of consecutive naturals, for example, 5835 + ... + 7705.

It is an arithmetic number, because the mean of its divisors is an integer number (1427868).

Almost surely, 2^12666670 is an apocalyptic number.

12666670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12666670 is a deficient number, since it is larger than the sum of its proper divisors (10179218).

12666670 is a wasteful number, since it uses less digits than its factorization.

12666670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 12666670 is about 3559.0265523033. The cubic root of 12666670 is about 233.1063756873.

It can be divided in two parts, 126666 and 70, that added together give a square (126736 = 356²).

The spelling of 12666670 in words is "twelve million, six hundred sixty-six thousand, six hundred seventy".