66322140 has 48 divisors (see below), whose sum is σ = 187424160. Its totient is φ = 17521920.

The previous prime is 66322121. The next prime is 66322163. The reversal of 66322140 is 4122366.

It is a self number, because there is not a number n which added to its sum of digits gives 66322140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470 + ... + 11610.

It is an arithmetic number, because the mean of its divisors is an integer number (3904670).

Almost surely, 2^66322140 is an apocalyptic number.

66322140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66322140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93712080).

66322140 is an abundant number, since it is smaller than the sum of its proper divisors (121102020).

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

66322140 is a wasteful number, since it uses less digits than its factorization.

66322140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10262 (or 10260 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 66322140 is about 8143.8406173009. The cubic root of 66322140 is about 404.7804327302.

The spelling of 66322140 in words is "sixty-six million, three hundred twenty-two thousand, one hundred forty".