12660669 has 36 divisors (see below), whose sum is σ = 22407840. Its totient is φ = 6849360.

The previous prime is 12660667. The next prime is 12660671. The reversal of 12660669 is 96606621.

It is a happy number.

12660669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12660667) and next prime (12660671).

It is not a de Polignac number, because 12660669 - 2¹ = 12660667 is a prime.

It is a super-2 number, since 2×12660669² = 320585079055122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660667) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7624 + ... + 9134.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^12660669 is an apocalyptic number.

12660669 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12660669 is a deficient number, since it is larger than the sum of its proper divisors (9747171).

12660669 is a wasteful number, since it uses less digits than its factorization.

12660669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 12660669 is about 3558.1833848187. The cubic root of 12660669 is about 233.0695574778.

The spelling of 12660669 in words is "twelve million, six hundred sixty thousand, six hundred sixty-nine".