66883284 has 72 divisors (see below), whose sum is σ = 183134952. Its totient is φ = 20459520.

The previous prime is 66883283. The next prime is 66883291. The reversal of 66883284 is 48238866.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9548100 + 57335184 = 3090^2 + 7572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112492 + ... + 113084.

It is an arithmetic number, because the mean of its divisors is an integer number (2543541).

Almost surely, 2^66883284 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 66883284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91567476).

66883284 is an abundant number, since it is smaller than the sum of its proper divisors (116251668).

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

66883284 is a wasteful number, since it uses less digits than its factorization.

66883284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 852 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 66883284 is about 8178.2200997528. The cubic root of 66883284 is about 405.9188283614.

The spelling of 66883284 in words is "sixty-six million, eight hundred eighty-three thousand, two hundred eighty-four".