3216645366 has 48 divisors (see below), whose sum is σ = 7204810032. Its totient is φ = 956338240.

The previous prime is 3216645347. The next prime is 3216645391. The reversal of 3216645366 is 6635466123.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3321 + ... + 80276.

It is an arithmetic number, because the mean of its divisors is an integer number (150100209).

Almost surely, 2^3216645366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216645366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3602405016).

3216645366 is an abundant number, since it is smaller than the sum of its proper divisors (3988164666).

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

3216645366 is a wasteful number, since it uses less digits than its factorization.

3216645366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83677 (or 83666 counting only the distinct ones).

The product of its digits is 466560, while the sum is 42.

The square root of 3216645366 is about 56715.4773055821. The cubic root of 3216645366 is about 1476.1632674985.

The spelling of 3216645366 in words is "three billion, two hundred sixteen million, six hundred forty-five thousand, three hundred sixty-six".