12666723 has 8 divisors (see below), whose sum is σ = 16905408. Its totient is φ = 8436264.

The previous prime is 12666701. The next prime is 12666727. The reversal of 12666723 is 32766621.

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

It is not a de Polignac number, because 12666723 - 2⁹ = 12666211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12666727) 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, 5040 + ... + 7122.

It is an arithmetic number, because the mean of its divisors is an integer number (2113176).

Almost surely, 2^12666723 is an apocalyptic number.

12666723 is a deficient number, since it is larger than the sum of its proper divisors (4238685).

12666723 is a wasteful number, since it uses less digits than its factorization.

12666723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113.

The product of its digits is 18144, while the sum is 33.

The square root of 12666723 is about 3559.0339981517. The cubic root of 12666723 is about 233.1067008088.

The spelling of 12666723 in words is "twelve million, six hundred sixty-six thousand, seven hundred twenty-three".