66520060 has 24 divisors (see below), whose sum is σ = 140797440. Its totient is φ = 26397504.

The previous prime is 66520039. The next prime is 66520061. The reversal of 66520060 is 6002566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66520061) 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, 10555 + ... + 15634.

It is an arithmetic number, because the mean of its divisors is an integer number (5866560).

Almost surely, 2^66520060 is an apocalyptic number.

It is an amenable number.

66520060 is an abundant number, since it is smaller than the sum of its proper divisors (74277380).

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

66520060 is a wasteful number, since it uses less digits than its factorization.

66520060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26325 (or 26323 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 66520060 is about 8155.9830799236. The cubic root of 66520060 is about 405.1826844383.

The spelling of 66520060 in words is "sixty-six million, five hundred twenty thousand, sixty".