66630256 has 40 divisors (see below), whose sum is σ = 160953984. Its totient is φ = 25959360.

The previous prime is 66630233. The next prime is 66630269. The reversal of 66630256 is 65203666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25810 + ... + 28273.

Almost surely, 2^66630256 is an apocalyptic number.

It is an amenable number.

66630256 is an abundant number, since it is smaller than the sum of its proper divisors (94323728).

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

66630256 is a wasteful number, since it uses less digits than its factorization.

66630256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54109 (or 54103 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 66630256 is about 8162.7358158892. The cubic root of 66630256 is about 405.4063005853.

The spelling of 66630256 in words is "sixty-six million, six hundred thirty thousand, two hundred fifty-six".