66524660 has 24 divisors (see below), whose sum is σ = 141089256. Its totient is φ = 26345600.

The previous prime is 66524659. The next prime is 66524663. The reversal of 66524660 is 6642566.

It can be written as a sum of positive squares in 4 ways, for example, as 7203856 + 59320804 = 2684^2 + 7702^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66524660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66524663) 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, 14447 + ... + 18486.

It is an arithmetic number, because the mean of its divisors is an integer number (5878719).

Almost surely, 2^66524660 is an apocalyptic number.

It is an amenable number.

66524660 is an abundant number, since it is smaller than the sum of its proper divisors (74564596).

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

66524660 is a wasteful number, since it uses less digits than its factorization.

66524660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33043 (or 33041 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66524660 is about 8156.2650766144. The cubic root of 66524660 is about 405.1920239638.

The spelling of 66524660 in words is "sixty-six million, five hundred twenty-four thousand, six hundred sixty".