66528432 has 40 divisors (see below), whose sum is σ = 190962480. Its totient is φ = 22176000.

The previous prime is 66528431. The next prime is 66528461. The reversal of 66528432 is 23482566.

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

It is not an unprimeable number, because it can be changed into a prime (66528431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76569 + ... + 77432.

It is an arithmetic number, because the mean of its divisors is an integer number (4774062).

Almost surely, 2^66528432 is an apocalyptic number.

It is an amenable number.

66528432 is an abundant number, since it is smaller than the sum of its proper divisors (124434048).

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

66528432 is a wasteful number, since it uses less digits than its factorization.

66528432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154018 (or 154006 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66528432 is about 8156.4963066258. The cubic root of 66528432 is about 405.1996820534.

The spelling of 66528432 in words is "sixty-six million, five hundred twenty-eight thousand, four hundred thirty-two".