2213688123866 has 4 divisors (see below), whose sum is σ = 3320532185802. Its totient is φ = 1106844061932.

The previous prime is 2213688123851. The next prime is 2213688123893. The reversal of 2213688123866 is 6683218863122.

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

It can be written as a sum of positive squares in only one way, i.e., 2100369040225 + 113319083641 = 1449265^2 + 336629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553422030965 + ... + 553422030968.

Almost surely, 2^{2213688123866} is an apocalyptic number.

2213688123866 is a deficient number, since it is larger than the sum of its proper divisors (1106844061936).

2213688123866 is a wasteful number, since it uses less digits than its factorization.

2213688123866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106844061935.

The product of its digits is 7962624, while the sum is 56.

The spelling of 2213688123866 in words is "two trillion, two hundred thirteen billion, six hundred eighty-eight million, one hundred twenty-three thousand, eight hundred sixty-six".