3221100666 has 96 divisors (see below), whose sum is σ = 8478013440. Its totient is φ = 863345952.

The previous prime is 3221100661. The next prime is 3221100677. The reversal of 3221100666 is 6660011223.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3221100661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 240051 + ... + 253113.

It is an arithmetic number, because the mean of its divisors is an integer number (88312640).

Almost surely, 2^3221100666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3221100666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4239006720).

3221100666 is an abundant number, since it is smaller than the sum of its proper divisors (5256912774).

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

3221100666 is a wasteful number, since it uses less digits than its factorization.

3221100666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200 (or 13197 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 3221100666 is about 56754.7413525954. The cubic root of 3221100666 is about 1476.8444861138.

Adding to 3221100666 its reverse (6660011223), we get a palindrome (9881111889).

The spelling of 3221100666 in words is "three billion, two hundred twenty-one million, one hundred thousand, six hundred sixty-six".