66725512 has 32 divisors (see below), whose sum is σ = 143320320. Its totient is φ = 28529280.

The previous prime is 66725509. The next prime is 66725513. The reversal of 66725512 is 21552766.

66725512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66725513) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28033 + ... + 30319.

It is an arithmetic number, because the mean of its divisors is an integer number (4478760).

Almost surely, 2^66725512 is an apocalyptic number.

It is an amenable number.

66725512 is an abundant number, since it is smaller than the sum of its proper divisors (76594808).

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

66725512 is a wasteful number, since it uses less digits than its factorization.

66725512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821 (or 2817 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 66725512 is about 8168.5685404482. The cubic root of 66725512 is about 405.5994010212.

The spelling of 66725512 in words is "sixty-six million, seven hundred twenty-five thousand, five hundred twelve".