2215663223666 has 8 divisors (see below), whose sum is σ = 3323628260784. Its totient is φ = 1107787136740.

The previous prime is 2215663223647. The next prime is 2215663223723. The reversal of 2215663223666 is 6663223665122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2215663223666² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22175240 + ... + 22274931.

It is an arithmetic number, because the mean of its divisors is an integer number (415453532598).

Almost surely, 2^{2215663223666} is an apocalyptic number.

2215663223666 is a deficient number, since it is larger than the sum of its proper divisors (1107965037118).

2215663223666 is a wasteful number, since it uses less digits than its factorization.

2215663223666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44475096.

The product of its digits is 5598720, while the sum is 50.

Adding to 2215663223666 its reverse (6663223665122), we get a palindrome (8878886888788).

The spelling of 2215663223666 in words is "two trillion, two hundred fifteen billion, six hundred sixty-three million, two hundred twenty-three thousand, six hundred sixty-six".