66065072 has 20 divisors (see below), whose sum is σ = 128168880. Its totient is φ = 32989248.

The previous prime is 66065029. The next prime is 66065081. The reversal of 66065072 is 27056066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12458 + ... + 16950.

It is an arithmetic number, because the mean of its divisors is an integer number (6408444).

Almost surely, 2^66065072 is an apocalyptic number.

It is an amenable number.

66065072 is a deficient number, since it is larger than the sum of its proper divisors (62103808).

66065072 is a wasteful number, since it uses less digits than its factorization.

66065072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420 (or 5414 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66065072 is about 8128.0423227245. The cubic root of 66065072 is about 404.2567723618.

The spelling of 66065072 in words is "sixty-six million, sixty-five thousand, seventy-two".