66424512 has 112 divisors (see below), whose sum is σ = 219163392. Its totient is φ = 17249280.

The previous prime is 66424511. The next prime is 66424541. The reversal of 66424512 is 21542466.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 66424512.

It is not an unprimeable number, because it can be changed into a prime (66424511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12538 + ... + 17030.

It is an arithmetic number, because the mean of its divisors is an integer number (1956816).

Almost surely, 2^66424512 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 66424512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109581696).

66424512 is an abundant number, since it is smaller than the sum of its proper divisors (152738880).

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

66424512 is a wasteful number, since it uses less digits than its factorization.

66424512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4526 (or 4516 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 66424512 is about 8150.1234346481. The cubic root of 66424512 is about 404.9885928810.

Adding to 66424512 its reverse (21542466), we get a palindrome (87966978).

The spelling of 66424512 in words is "sixty-six million, four hundred twenty-four thousand, five hundred twelve".