12002166665 has 16 divisors (see below), whose sum is σ = 14755540800. Its totient is φ = 9366985152.

The previous prime is 12002166643. The next prime is 12002166667. The reversal of 12002166665 is 56666120021.

It is not a de Polignac number, because 12002166665 - 2⁸ = 12002166409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12002166667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144566 + ... + 211904.

It is an arithmetic number, because the mean of its divisors is an integer number (922221300).

Almost surely, 2^12002166665 is an apocalyptic number.

It is an amenable number.

12002166665 is a deficient number, since it is larger than the sum of its proper divisors (2753374135).

12002166665 is an equidigital number, since it uses as much as digits as its factorization.

12002166665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68216.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 12002166665 its reverse (56666120021), we get a palindrome (68668286686).

The spelling of 12002166665 in words is "twelve billion, two million, one hundred sixty-six thousand, six hundred sixty-five".