66136528 has 20 divisors (see below), whose sum is σ = 135677700. Its totient is φ = 31122944.

The previous prime is 66136507. The next prime is 66136531. The reversal of 66136528 is 82563166.

66136528 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61591104 + 4545424 = 7848^2 + 2132^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121303 + ... + 121846.

It is an arithmetic number, because the mean of its divisors is an integer number (6783885).

Almost surely, 2^66136528 is an apocalyptic number.

66136528 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66136528 is an abundant number, since it is smaller than the sum of its proper divisors (69541172).

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

66136528 is a wasteful number, since it uses less digits than its factorization.

66136528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243174 (or 243168 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 66136528 is about 8132.4367811868. The cubic root of 66136528 is about 404.4024679250.

The spelling of 66136528 in words is "sixty-six million, one hundred thirty-six thousand, five hundred twenty-eight".