66147072 has 72 divisors (see below), whose sum is σ = 180231744. Its totient is φ = 21525504.

The previous prime is 66147071. The next prime is 66147077. The reversal of 66147072 is 27074166.

It is not an unprimeable number, because it can be changed into a prime (66147071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32023 + ... + 34025.

Almost surely, 2^66147072 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 66147072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90115872).

66147072 is an abundant number, since it is smaller than the sum of its proper divisors (114084672).

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

66147072 is a wasteful number, since it uses less digits than its factorization.

66147072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065 (or 2051 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 66147072 is about 8133.0850235320. The cubic root of 66147072 is about 404.4239577792.

The spelling of 66147072 in words is "sixty-six million, one hundred forty-seven thousand, seventy-two".