12664155 has 32 divisors (see below), whose sum is σ = 23961600. Its totient is φ = 5588352.

The previous prime is 12664153. The next prime is 12664181. The reversal of 12664155 is 55146621.

It is not a de Polignac number, because 12664155 - 2¹ = 12664153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12664153) 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 31 ways as a sum of consecutive naturals, for example, 966 + ... + 5124.

It is an arithmetic number, because the mean of its divisors is an integer number (748800).

Almost surely, 2^12664155 is an apocalyptic number.

12664155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12664155 is a deficient number, since it is larger than the sum of its proper divisors (11297445).

12664155 is a wasteful number, since it uses less digits than its factorization.

12664155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203.

The product of its digits is 7200, while the sum is 30.

The square root of 12664155 is about 3558.6732078121. The cubic root of 12664155 is about 233.0909467087.

The spelling of 12664155 in words is "twelve million, six hundred sixty-four thousand, one hundred fifty-five".