13185001666 has 8 divisors (see below), whose sum is σ = 20637393984. Its totient is φ = 6305870340.

The previous prime is 13185001663. The next prime is 13185001673. The reversal of 13185001666 is 66610058131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13185001663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143315190 + ... + 143315281.

It is an arithmetic number, because the mean of its divisors is an integer number (2579674248).

Almost surely, 2^13185001666 is an apocalyptic number.

13185001666 is a deficient number, since it is larger than the sum of its proper divisors (7452392318).

13185001666 is a wasteful number, since it uses less digits than its factorization.

13185001666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286630496.

The product of its (nonzero) digits is 25920, while the sum is 37.

Adding to 13185001666 its reverse (66610058131), we get a palindrome (79795059797).

The spelling of 13185001666 in words is "thirteen billion, one hundred eighty-five million, one thousand, six hundred sixty-six".