2223140235666 has 64 divisors (see below), whose sum is σ = 5211853590528. Its totient is φ = 619000161408.

The previous prime is 2223140235661. The next prime is 2223140235727. The reversal of 2223140235666 is 6665320413222.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2223140235661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1956820 + ... + 2876703.

It is an arithmetic number, because the mean of its divisors is an integer number (81435212352).

Almost surely, 2^{2223140235666} is an apocalyptic number.

2223140235666 is an abundant number, since it is smaller than the sum of its proper divisors (2988713354862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2223140235666 is a wasteful number, since it uses less digits than its factorization.

2223140235666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4833815.

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 2223140235666 its reverse (6665320413222), we get a palindrome (8888460648888).

The spelling of 2223140235666 in words is "two trillion, two hundred twenty-three billion, one hundred forty million, two hundred thirty-five thousand, six hundred sixty-six".