2218665868701 has 4 divisors (see below), whose sum is σ = 2958221158272. Its totient is φ = 1479110579132.

The previous prime is 2218665868697. The next prime is 2218665868733. The reversal of 2218665868701 is 1078685668122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2218665868701 - 2² = 2218665868697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218665868501) 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, 369777644781 + ... + 369777644786.

It is an arithmetic number, because the mean of its divisors is an integer number (739555289568).

Almost surely, 2^{2218665868701} is an apocalyptic number.

It is an amenable number.

2218665868701 is a deficient number, since it is larger than the sum of its proper divisors (739555289571).

2218665868701 is an equidigital number, since it uses as much as digits as its factorization.

2218665868701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739555289570.

The product of its (nonzero) digits is 15482880, while the sum is 60.

The spelling of 2218665868701 in words is "two trillion, two hundred eighteen billion, six hundred sixty-five million, eight hundred sixty-eight thousand, seven hundred one".