66544268 has 12 divisors (see below), whose sum is σ = 133088592. Its totient is φ = 28518960.

The previous prime is 66544237. The next prime is 66544279. The reversal of 66544268 is 86244566.

66544268 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188263 + ... + 1188318.

It is an arithmetic number, because the mean of its divisors is an integer number (11090716).

Almost surely, 2^66544268 is an apocalyptic number.

It is an amenable number.

66544268 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66544268 is a wasteful number, since it uses less digits than its factorization.

66544268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2376592 (or 2376590 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 66544268 is about 8157.4670088208. The cubic root of 66544268 is about 405.2318298781.

The spelling of 66544268 in words is "sixty-six million, five hundred forty-four thousand, two hundred sixty-eight".