66528752 has 40 divisors (see below), whose sum is σ = 137129616. Its totient is φ = 31159296.

The previous prime is 66528739. The next prime is 66528767. The reversal of 66528752 is 25782566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74903 + ... + 75785.

Almost surely, 2^66528752 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 66528752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68564808).

66528752 is an abundant number, since it is smaller than the sum of its proper divisors (70600864).

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

66528752 is a wasteful number, since it uses less digits than its factorization.

66528752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1179 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 66528752 is about 8156.5159228680. The cubic root of 66528752 is about 405.2003317190.

The spelling of 66528752 in words is "sixty-six million, five hundred twenty-eight thousand, seven hundred fifty-two".