2267331664721 has 4 divisors (see below), whose sum is σ = 2267335303332. Its totient is φ = 2267328026112.

The previous prime is 2267331664699. The next prime is 2267331664723. The reversal of 2267331664721 is 1274661337622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 718364734096 + 1548966930625 = 847564^2 + 1244575^2 .

It is a cyclic number.

It is not a de Polignac number, because 2267331664721 - 2³⁴ = 2250151795537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2267331664721.

It is not an unprimeable number, because it can be changed into a prime (2267331664723) 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, 621920 + ... + 2218433.

It is an arithmetic number, because the mean of its divisors is an integer number (566833825833).

Almost surely, 2^{2267331664721} is an apocalyptic number.

It is an amenable number.

2267331664721 is a deficient number, since it is larger than the sum of its proper divisors (3638611).

2267331664721 is an equidigital number, since it uses as much as digits as its factorization.

2267331664721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638610.

The product of its digits is 3048192, while the sum is 50.

The spelling of 2267331664721 in words is "two trillion, two hundred sixty-seven billion, three hundred thirty-one million, six hundred sixty-four thousand, seven hundred twenty-one".