66524472 has 96 divisors (see below), whose sum is σ = 216777600. Its totient is φ = 18004032.

The previous prime is 66524467. The next prime is 66524473. The reversal of 66524472 is 27442566.

66524472 is a `hidden beast` number, since 66 + 524 + 4 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66524473) 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, 6103 + ... + 13049.

It is an arithmetic number, because the mean of its divisors is an integer number (2258100).

Almost surely, 2^66524472 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 66524472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108388800).

66524472 is an abundant number, since it is smaller than the sum of its proper divisors (150253128).

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

66524472 is a wasteful number, since it uses less digits than its factorization.

66524472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6985 (or 6978 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 66524472 is about 8156.2535517234. The cubic root of 66524472 is about 405.1916422699.

The spelling of 66524472 in words is "sixty-six million, five hundred twenty-four thousand, four hundred seventy-two".