13220216666045 has 8 divisors (see below), whose sum is σ = 16797451764024. Its totient is φ = 9954045489664.

The previous prime is 13220216666029. The next prime is 13220216666087. The reversal of 13220216666045 is 54066661202231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1236697460761 + 11983519205284 = 1112069^2 + 3461722^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13220216666045 - 2⁴ = 13220216666029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13220216665987 and 13220216666005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77765980304 + ... + 77765980473.

It is an arithmetic number, because the mean of its divisors is an integer number (2099681470503).

Almost surely, 2^{13220216666045} is an apocalyptic number.

It is an amenable number.

13220216666045 is a deficient number, since it is larger than the sum of its proper divisors (3577235097979).

13220216666045 is a wasteful number, since it uses less digits than its factorization.

13220216666045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155531960799.

The product of its (nonzero) digits is 622080, while the sum is 44.

Adding to 13220216666045 its reverse (54066661202231), we get a palindrome (67286877868276).

The spelling of 13220216666045 in words is "thirteen trillion, two hundred twenty billion, two hundred sixteen million, six hundred sixty-six thousand, forty-five".