12640766 has 8 divisors (see below), whose sum is σ = 19138680. Its totient is φ = 6261208.

The previous prime is 12640763. The next prime is 12640783. The reversal of 12640766 is 66704621.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29321 + ... + 29748.

It is an arithmetic number, because the mean of its divisors is an integer number (2392335).

Almost surely, 2^12640766 is an apocalyptic number.

12640766 is a deficient number, since it is larger than the sum of its proper divisors (6497914).

12640766 is a wasteful number, since it uses less digits than its factorization.

12640766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59178.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 12640766 is about 3555.3854924607. The cubic root of 12640766 is about 232.9473623473.

The spelling of 12640766 in words is "twelve million, six hundred forty thousand, seven hundred sixty-six".