12165534466 has 4 divisors (see below), whose sum is σ = 18248301702. Its totient is φ = 6082767232.

The previous prime is 12165534443. The next prime is 12165534467. The reversal of 12165534466 is 66443556121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66443556121 = 22193 ⋅2993897.

It can be written as a sum of positive squares in only one way, i.e., 11803736025 + 361798441 = 108645^2 + 19021^2 .

It is not an unprimeable number, because it can be changed into a prime (12165534467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3041383615 + ... + 3041383618.

Almost surely, 2^12165534466 is an apocalyptic number.

12165534466 is a deficient number, since it is larger than the sum of its proper divisors (6082767236).

12165534466 is an equidigital number, since it uses as much as digits as its factorization.

12165534466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082767235.

The product of its digits is 518400, while the sum is 43.

The spelling of 12165534466 in words is "twelve billion, one hundred sixty-five million, five hundred thirty-four thousand, four hundred sixty-six".