12067661 has 4 divisors (see below), whose sum is σ = 12393852. Its totient is φ = 11741472.

The previous prime is 12067651. The next prime is 12067681. The reversal of 12067661 is 16676021.

12067661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7946761 + 4120900 = 2819^2 + 2030^2 .

It is a cyclic number.

It is not a de Polignac number, because 12067661 - 2²² = 7873357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12067631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 163040 + ... + 163113.

It is an arithmetic number, because the mean of its divisors is an integer number (3098463).

Almost surely, 2^12067661 is an apocalyptic number.

It is an amenable number.

12067661 is a deficient number, since it is larger than the sum of its proper divisors (326191).

12067661 is an equidigital number, since it uses as much as digits as its factorization.

12067661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326190.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 12067661 is about 3473.8539117240. The cubic root of 12067661 is about 229.3723340374.

The spelling of 12067661 in words is "twelve million, sixty-seven thousand, six hundred sixty-one".