66730256 has 10 divisors (see below), whose sum is σ = 129289902. Its totient is φ = 33365120.

The previous prime is 66730217. The next prime is 66730267. The reversal of 66730256 is 65203766.

66730256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 10240000 = 7516^2 + 3200^2 .

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 as a sum of consecutive naturals, namely, 2085305 + ... + 2085336.

Almost surely, 2^66730256 is an apocalyptic number.

It is an amenable number.

66730256 is a deficient number, since it is larger than the sum of its proper divisors (62559646).

66730256 is a wasteful number, since it uses less digits than its factorization.

66730256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170649 (or 4170643 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 66730256 is about 8168.8589166419. The cubic root of 66730256 is about 405.6090131266.

The spelling of 66730256 in words is "sixty-six million, seven hundred thirty thousand, two hundred fifty-six".