66284500 has 48 divisors (see below), whose sum is σ = 148180032. Its totient is φ = 25888800.

The previous prime is 66284489. The next prime is 66284527. The reversal of 66284500 is 548266.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19959 + ... + 23041.

It is an arithmetic number, because the mean of its divisors is an integer number (3087084).

Almost surely, 2^66284500 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 66284500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74090016).

66284500 is an abundant number, since it is smaller than the sum of its proper divisors (81895532).

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

66284500 is a wasteful number, since it uses less digits than its factorization.

66284500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3133 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 66284500 is about 8141.5293403635. The cubic root of 66284500 is about 404.7038428277.

The spelling of 66284500 in words is "sixty-six million, two hundred eighty-four thousand, five hundred".