12219966 has 24 divisors (see below), whose sum is σ = 28884024. Its totient is φ = 3702960.

The previous prime is 12219931. The next prime is 12219973. The reversal of 12219966 is 66991221.

It is a super-3 number, since 3×12219966³ (a number of 22 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12219966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30661 + ... + 31056.

It is an arithmetic number, because the mean of its divisors is an integer number (1203501).

Almost surely, 2^12219966 is an apocalyptic number.

12219966 is an abundant number, since it is smaller than the sum of its proper divisors (16664058).

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

12219966 is a wasteful number, since it uses less digits than its factorization.

12219966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61736 (or 61733 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 12219966 is about 3495.7067954850. The cubic root of 12219966 is about 230.3332660822. Note that the first 3 decimals are identical.

It can be divided in two parts, 122199 and 66, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 12219966 in words is "twelve million, two hundred nineteen thousand, nine hundred sixty-six".