66528885 has 8 divisors (see below), whose sum is σ = 106446240. Its totient is φ = 35482064.

The previous prime is 66528877. The next prime is 66528887. The reversal of 66528885 is 58882566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66528885 - 2³ = 66528877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66528887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217615 + ... + 2217644.

It is an arithmetic number, because the mean of its divisors is an integer number (13305780).

Almost surely, 2^66528885 is an apocalyptic number.

It is an amenable number.

66528885 is a deficient number, since it is larger than the sum of its proper divisors (39917355).

66528885 is a wasteful number, since it uses less digits than its factorization.

66528885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4435267.

The product of its digits is 921600, while the sum is 48.

The square root of 66528885 is about 8156.5240758549. The cubic root of 66528885 is about 405.2006017356.

The spelling of 66528885 in words is "sixty-six million, five hundred twenty-eight thousand, eight hundred eighty-five".