2216661116672 has 72 divisors (see below), whose sum is σ = 4573488525312. Its totient is φ = 1071146880000.

The previous prime is 2216661116653. The next prime is 2216661116689. The reversal of 2216661116672 is 2766111666122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5773973 + ... + 6145899.

Almost surely, 2^{2216661116672} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2216661116672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2286744262656).

2216661116672 is an abundant number, since it is smaller than the sum of its proper divisors (2356827408640).

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

2216661116672 is an equidigital number, since it uses as much as digits as its factorization.

2216661116672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372725 (or 372711 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The spelling of 2216661116672 in words is "two trillion, two hundred sixteen billion, six hundred sixty-one million, one hundred sixteen thousand, six hundred seventy-two".