66555528 has 32 divisors (see below), whose sum is σ = 179188800. Its totient is φ = 20478528.

The previous prime is 66555521. The next prime is 66555539. The reversal of 66555528 is 82555566.

It is a self number, because there is not a number n which added to its sum of digits gives 66555528.

It is not an unprimeable number, because it can be changed into a prime (66555521) 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, 106348 + ... + 106971.

It is an arithmetic number, because the mean of its divisors is an integer number (5599650).

Almost surely, 2^66555528 is an apocalyptic number.

It is an amenable number.

66555528 is an abundant number, since it is smaller than the sum of its proper divisors (112633272).

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

66555528 is a wasteful number, since it uses less digits than its factorization.

66555528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213341 (or 213337 counting only the distinct ones).

The product of its digits is 360000, while the sum is 42.

The square root of 66555528 is about 8158.1571448459. The cubic root of 66555528 is about 405.2546851051.

The spelling of 66555528 in words is "sixty-six million, five hundred fifty-five thousand, five hundred twenty-eight".