12664445 has 16 divisors (see below), whose sum is σ = 15845760. Its totient is φ = 9705024.

The previous prime is 12664423. The next prime is 12664447. The reversal of 12664445 is 54446621.

It is not a de Polignac number, because 12664445 - 2¹⁴ = 12648061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23954 + ... + 24476.

It is an arithmetic number, because the mean of its divisors is an integer number (990360).

Almost surely, 2^12664445 is an apocalyptic number.

It is an amenable number.

12664445 is a deficient number, since it is larger than the sum of its proper divisors (3181315).

12664445 is a wasteful number, since it uses less digits than its factorization.

12664445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its digits is 23040, while the sum is 32.

The square root of 12664445 is about 3558.7139531016. The cubic root of 12664445 is about 233.0927258999.

The spelling of 12664445 in words is "twelve million, six hundred sixty-four thousand, four hundred forty-five".