66530028 has 24 divisors (see below), whose sum is σ = 155741488. Its totient is φ = 22104576.

The previous prime is 66529997. The next prime is 66530029. The reversal of 66530028 is 82003566.

It is a junction number, because it is equal to n+sod(n) for n = 66529977 and 66530004.

It is not an unprimeable number, because it can be changed into a prime (66530029) 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, 5101 + ... + 12612.

Almost surely, 2^66530028 is an apocalyptic number.

It is an amenable number.

66530028 is an abundant number, since it is smaller than the sum of its proper divisors (89211460).

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

66530028 is a wasteful number, since it uses less digits than its factorization.

66530028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18033 (or 18031 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66530028 is about 8156.5941421650. The cubic root of 66530028 is about 405.2029222396.

The spelling of 66530028 in words is "sixty-six million, five hundred thirty thousand, twenty-eight".