12669664 has 48 divisors (see below), whose sum is σ = 28764288. Its totient is φ = 5380992.

The previous prime is 12669659. The next prime is 12669667. The reversal of 12669664 is 46696621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12669667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36339 + ... + 36685.

It is an arithmetic number, because the mean of its divisors is an integer number (599256).

Almost surely, 2^12669664 is an apocalyptic number.

12669664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12669664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14382144).

12669664 is an abundant number, since it is smaller than the sum of its proper divisors (16094624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12669664 is a wasteful number, since it uses less digits than its factorization.

12669664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 519 counting only the distinct ones).

The product of its digits is 93312, while the sum is 40.

The square root of 12669664 is about 3559.4471480835. The cubic root of 12669664 is about 233.1247405642.

The spelling of 12669664 in words is "twelve million, six hundred sixty-nine thousand, six hundred sixty-four".