12664466406511 has 4 divisors (see below), whose sum is σ = 12666704345800. Its totient is φ = 12662228467224.

The previous prime is 12664466406503. The next prime is 12664466406517. The reversal of 12664466406511 is 11560466446621.

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

It is a cyclic number.

It is not a de Polignac number, because 12664466406511 - 2³ = 12664466406503 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 (12664466406517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118961156 + ... + 1118972473.

It is an arithmetic number, because the mean of its divisors is an integer number (3166676086450).

Almost surely, 2^{12664466406511} is an apocalyptic number.

12664466406511 is a deficient number, since it is larger than the sum of its proper divisors (2237939289).

12664466406511 is an equidigital number, since it uses as much as digits as its factorization.

12664466406511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2237939288.

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 12664466406511 in words is "twelve trillion, six hundred sixty-four billion, four hundred sixty-six million, four hundred six thousand, five hundred eleven".