66520134 has 48 divisors (see below), whose sum is σ = 149722560. Its totient is φ = 21329280.

The previous prime is 66520063. The next prime is 66520151. The reversal of 66520134 is 43102566.

66520134 is a `hidden beast` number, since 6 + 6 + 520 + 134 = 666.

66520134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66520098 and 66520107.

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 23 ways as a sum of consecutive naturals, for example, 50962 + ... + 52250.

It is an arithmetic number, because the mean of its divisors is an integer number (3119220).

Almost surely, 2^66520134 is an apocalyptic number.

66520134 is an abundant number, since it is smaller than the sum of its proper divisors (83202426).

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

66520134 is a wasteful number, since it uses less digits than its factorization.

66520134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66520134 is about 8155.9876164693. The cubic root of 66520134 is about 405.1828346862.

The spelling of 66520134 in words is "sixty-six million, five hundred twenty thousand, one hundred thirty-four".