11646464666 has 4 divisors (see below), whose sum is σ = 17469697002. Its totient is φ = 5823232332.

The previous prime is 11646464663. The next prime is 11646464671. The reversal of 11646464666 is 66646464611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66646464611 = 2801 ⋅23793811.

It can be written as a sum of positive squares in only one way, i.e., 11198084041 + 448380625 = 105821^2 + 21175^2 .

It is not an unprimeable number, because it can be changed into a prime (11646464663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2911616165 + ... + 2911616168.

Almost surely, 2^11646464666 is an apocalyptic number.

11646464666 is a deficient number, since it is larger than the sum of its proper divisors (5823232336).

11646464666 is an equidigital number, since it uses as much as digits as its factorization.

11646464666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823232335.

The product of its digits is 2985984, while the sum is 50.

Subtracting 11646464666 from its reverse (66646464611), we obtain a palindrome (54999999945).

The spelling of 11646464666 in words is "eleven billion, six hundred forty-six million, four hundred sixty-four thousand, six hundred sixty-six".