12066619 has 4 divisors (see below), whose sum is σ = 12108096. Its totient is φ = 12025144.

The previous prime is 12066611. The next prime is 12066641. The reversal of 12066619 is 91666021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91666021 = 271 ⋅338251.

It is a cyclic number.

It is not a de Polignac number, because 12066619 - 2³ = 12066611 is a prime.

It is a super-2 number, since 2×12066619² = 291206588182322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12066611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20299 + ... + 20884.

It is an arithmetic number, because the mean of its divisors is an integer number (3027024).

Almost surely, 2^12066619 is an apocalyptic number.

12066619 is a deficient number, since it is larger than the sum of its proper divisors (41477).

12066619 is an equidigital number, since it uses as much as digits as its factorization.

12066619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41476.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 12066619 is about 3473.7039309648. The cubic root of 12066619 is about 229.3657320164.

The spelling of 12066619 in words is "twelve million, sixty-six thousand, six hundred nineteen".