2664013321321 has 16 divisors (see below), whose sum is σ = 3004037595648. Its totient is φ = 2340509097600.

The previous prime is 2664013321313. The next prime is 2664013321327. The reversal of 2664013321321 is 1231233104662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2664013321321 - 2³ = 2664013321313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2664013321327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5079076 + ... + 5578981.

It is an arithmetic number, because the mean of its divisors is an integer number (187752349728).

Almost surely, 2^{2664013321321} is an apocalyptic number.

It is an amenable number.

2664013321321 is a deficient number, since it is larger than the sum of its proper divisors (340024274327).

2664013321321 is a wasteful number, since it uses less digits than its factorization.

2664013321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10658832.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 2664013321321 its reverse (1231233104662), we get a palindrome (3895246425983).

The spelling of 2664013321321 in words is "two trillion, six hundred sixty-four billion, thirteen million, three hundred twenty-one thousand, three hundred twenty-one".