2066221696 has 128 divisors (see below), whose sum is σ = 5309712000. Its totient is φ = 777154560.

The previous prime is 2066221693. The next prime is 2066221697. The reversal of 2066221696 is 6961226602.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×2066221696² = 8538544194042232832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2066221693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282210 + ... + 289438.

It is an arithmetic number, because the mean of its divisors is an integer number (41482125).

Almost surely, 2^2066221696 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 2066221696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2654856000).

2066221696 is an abundant number, since it is smaller than the sum of its proper divisors (3243490304).

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

2066221696 is a wasteful number, since it uses less digits than its factorization.

2066221696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7290 (or 7278 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 2066221696 is about 45455.7113683198. The cubic root of 2066221696 is about 1273.6760206889.

The spelling of 2066221696 in words is "two billion, sixty-six million, two hundred twenty-one thousand, six hundred ninety-six".