66582256 has 20 divisors (see below), whose sum is σ = 138926872. Its totient is φ = 30730176.

The previous prime is 66582253. The next prime is 66582311. The reversal of 66582256 is 65228566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66582253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159846 + ... + 160261.

Almost surely, 2^66582256 is an apocalyptic number.

It is an amenable number.

66582256 is an abundant number, since it is smaller than the sum of its proper divisors (72344616).

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

66582256 is a wasteful number, since it uses less digits than its factorization.

66582256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320128 (or 320122 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 66582256 is about 8159.7950954666. The cubic root of 66582256 is about 405.3089265179.

The spelling of 66582256 in words is "sixty-six million, five hundred eighty-two thousand, two hundred fifty-six".