13146211666 has 48 divisors (see below), whose sum is σ = 23626728000. Its totient is φ = 5466007008.

The previous prime is 13146211651. The next prime is 13146211709. The reversal of 13146211666 is 66611264131.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1296685 + ... + 1306783.

It is an arithmetic number, because the mean of its divisors is an integer number (492223500).

Almost surely, 2^13146211666 is an apocalyptic number.

13146211666 is a deficient number, since it is larger than the sum of its proper divisors (10480516334).

13146211666 is a wasteful number, since it uses less digits than its factorization.

13146211666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10511 (or 10504 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

Adding to 13146211666 its reverse (66611264131), we get a palindrome (79757475797).

The spelling of 13146211666 in words is "thirteen billion, one hundred forty-six million, two hundred eleven thousand, six hundred sixty-six".