12638966 has 4 divisors (see below), whose sum is σ = 18958452. Its totient is φ = 6319482.

The previous prime is 12638957. The next prime is 12638987. The reversal of 12638966 is 66983621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66983621 = 17 ⋅3940213.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3159740 + ... + 3159743.

It is an arithmetic number, because the mean of its divisors is an integer number (4739613).

Almost surely, 2^12638966 is an apocalyptic number.

12638966 is a deficient number, since it is larger than the sum of its proper divisors (6319486).

12638966 is an equidigital number, since it uses as much as digits as its factorization.

12638966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6319485.

The product of its digits is 93312, while the sum is 41.

The square root of 12638966 is about 3555.1323463410. The cubic root of 12638966 is about 232.9363048645.

The spelling of 12638966 in words is "twelve million, six hundred thirty-eight thousand, nine hundred sixty-six".