66156528 has 40 divisors (see below), whose sum is σ = 172430928. Its totient is φ = 21855232.

The previous prime is 66156509. The next prime is 66156529. The reversal of 66156528 is 82565166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156529) 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, 675 + ... + 11522.

Almost surely, 2^66156528 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 66156528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86215464).

66156528 is an abundant number, since it is smaller than the sum of its proper divisors (106274400).

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

66156528 is a wasteful number, since it uses less digits than its factorization.

66156528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12321 (or 12315 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 66156528 is about 8133.6663319809. Note that the first 3 decimals coincide. The cubic root of 66156528 is about 404.4432282252.

The spelling of 66156528 in words is "sixty-six million, one hundred fifty-six thousand, five hundred twenty-eight".