11656200210666 has 48 divisors (see below), whose sum is σ = 26973025312800. Its totient is φ = 3346277568480.

The previous prime is 11656200210659. The next prime is 11656200210727. The reversal of 11656200210666 is 66601200265611.

It is a super-2 number, since 2×11656200210666² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 422496001 + ... + 422523588.

It is an arithmetic number, because the mean of its divisors is an integer number (561938027350).

Almost surely, 2^{11656200210666} is an apocalyptic number.

11656200210666 is an abundant number, since it is smaller than the sum of its proper divisors (15316825102134).

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

11656200210666 is a wasteful number, since it uses less digits than its factorization.

11656200210666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845019635 (or 845019624 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

Subtracting 11656200210666 from its reverse (66601200265611), we obtain a palindrome (54945000054945).

The spelling of 11656200210666 in words is "eleven trillion, six hundred fifty-six billion, two hundred million, two hundred ten thousand, six hundred sixty-six".