12365204666 has 4 divisors (see below), whose sum is σ = 18547807002. Its totient is φ = 6182602332.

The previous prime is 12365204651. The next prime is 12365204681. The reversal of 12365204666 is 66640256321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66640256321 = 8221 ⋅8106101.

It is an interprime number because it is at equal distance from previous prime (12365204651) and next prime (12365204681).

It can be written as a sum of positive squares in only one way, i.e., 10154794441 + 2210410225 = 100771^2 + 47015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3091301165 + ... + 3091301168.

Almost surely, 2^12365204666 is an apocalyptic number.

12365204666 is a deficient number, since it is larger than the sum of its proper divisors (6182602336).

12365204666 is an equidigital number, since it uses as much as digits as its factorization.

12365204666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6182602335.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 12365204666 in words is "twelve billion, three hundred sixty-five million, two hundred four thousand, six hundred sixty-six".