1320022566655 has 8 divisors (see below), whose sum is σ = 1705875316992. Its totient is φ = 974785895328.

The previous prime is 1320022566647. The next prime is 1320022566659. The reversal of 1320022566655 is 5566652200231.

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 1320022566655 - 2³ = 1320022566647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320022566659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10154019679 + ... + 10154019808.

It is an arithmetic number, because the mean of its divisors is an integer number (213234414624).

Almost surely, 2^{1320022566655} is an apocalyptic number.

1320022566655 is a deficient number, since it is larger than the sum of its proper divisors (385852750337).

1320022566655 is a wasteful number, since it uses less digits than its factorization.

1320022566655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20308039505.

The product of its (nonzero) digits is 648000, while the sum is 43.

Adding to 1320022566655 its reverse (5566652200231), we get a palindrome (6886674766886).

The spelling of 1320022566655 in words is "one trillion, three hundred twenty billion, twenty-two million, five hundred sixty-six thousand, six hundred fifty-five".