2222666640661 has 4 divisors (see below), whose sum is σ = 2222703949024. Its totient is φ = 2222629332300.

The previous prime is 2222666640647. The next prime is 2222666640697. The reversal of 2222666640661 is 1660466662222.

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 2222666640661 - 2³⁷ = 2085227687189 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 (2222666640361) 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, 18564675 + ... + 18684016.

It is an arithmetic number, because the mean of its divisors is an integer number (555675987256).

Almost surely, 2^{2222666640661} is an apocalyptic number.

It is an amenable number.

2222666640661 is a deficient number, since it is larger than the sum of its proper divisors (37308363).

2222666640661 is an equidigital number, since it uses as much as digits as its factorization.

2222666640661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37308362.

The product of its (nonzero) digits is 2985984, while the sum is 49.

The spelling of 2222666640661 in words is "two trillion, two hundred twenty-two billion, six hundred sixty-six million, six hundred forty thousand, six hundred sixty-one".