66616284 has 72 divisors (see below), whose sum is σ = 181912080. Its totient is φ = 18918144.

The previous prime is 66616279. The next prime is 66616289. The reversal of 66616284 is 48261666.

It is an interprime number because it is at equal distance from previous prime (66616279) and next prime (66616289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66616289) 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, 162672 + ... + 163080.

Almost surely, 2^66616284 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 66616284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90956040).

66616284 is an abundant number, since it is smaller than the sum of its proper divisors (115295796).

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

66616284 is a wasteful number, since it uses less digits than its factorization.

66616284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 698 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 66616284 is about 8161.8799305062. The cubic root of 66616284 is about 405.3779614436.

The spelling of 66616284 in words is "sixty-six million, six hundred sixteen thousand, two hundred eighty-four".