12666630 has 32 divisors (see below), whose sum is σ = 30772224. Its totient is φ = 3336416.

The previous prime is 12666607. The next prime is 12666671. The reversal of 12666630 is 3666621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54 + ... + 5033.

It is an arithmetic number, because the mean of its divisors is an integer number (961632).

Almost surely, 2^12666630 is an apocalyptic number.

12666630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12666630 is an abundant number, since it is smaller than the sum of its proper divisors (18105594).

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

12666630 is a wasteful number, since it uses less digits than its factorization.

12666630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5180.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 12666630 is about 3559.0209327847. The cubic root of 12666630 is about 233.1061303120.

Subtracting from 12666630 its reverse (3666621), we obtain a palindrome (9000009).

The spelling of 12666630 in words is "twelve million, six hundred sixty-six thousand, six hundred thirty".