12690666 has 24 divisors (see below), whose sum is σ = 27597024. Its totient is φ = 4214760.

The previous prime is 12690649. The next prime is 12690673. The reversal of 12690666 is 66609621.

It is a happy number.

It is a super-2 number, since 2×12690666² = 322106007047112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12690666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4465 + ... + 6731.

It is an arithmetic number, because the mean of its divisors is an integer number (1149876).

Almost surely, 2^12690666 is an apocalyptic number.

12690666 is an abundant number, since it is smaller than the sum of its proper divisors (14906358).

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

12690666 is a wasteful number, since it uses less digits than its factorization.

12690666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586 (or 2583 counting only the distinct ones).

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

The square root of 12690666 is about 3562.3961037482. The cubic root of 12690666 is about 233.2534833349.

The spelling of 12690666 in words is "twelve million, six hundred ninety thousand, six hundred sixty-six".