13220162666 has 8 divisors (see below), whose sum is σ = 19881222660. Its totient is φ = 6593088448.

The previous prime is 13220162653. The next prime is 13220162671. The reversal of 13220162666 is 66626102231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13183862041 + 36300625 = 114821^2 + 6025^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8495471 + ... + 8497026.

Almost surely, 2^13220162666 is an apocalyptic number.

13220162666 is a deficient number, since it is larger than the sum of its proper divisors (6661059994).

13220162666 is a wasteful number, since it uses less digits than its factorization.

13220162666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16992888.

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 13220162666 its reverse (66626102231), we get a palindrome (79846264897).

The spelling of 13220162666 in words is "thirteen billion, two hundred twenty million, one hundred sixty-two thousand, six hundred sixty-six".