13164521666 has 16 divisors (see below), whose sum is σ = 20045624256. Its totient is φ = 6482687376.

The previous prime is 13164521641. The next prime is 13164521683. The reversal of 13164521666 is 66612546131.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1097795 + ... + 1109721.

It is an arithmetic number, because the mean of its divisors is an integer number (1252851516).

Almost surely, 2^13164521666 is an apocalyptic number.

13164521666 is a deficient number, since it is larger than the sum of its proper divisors (6881102590).

13164521666 is a wasteful number, since it uses less digits than its factorization.

13164521666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20233.

The product of its digits is 155520, while the sum is 41.

The spelling of 13164521666 in words is "thirteen billion, one hundred sixty-four million, five hundred twenty-one thousand, six hundred sixty-six".