66065648 has 20 divisors (see below), whose sum is σ = 139639128. Its totient is φ = 30029760.

The previous prime is 66065627. The next prime is 66065651. The reversal of 66065648 is 84656066.

It is a super-3 number, since 3×66065648³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

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, 187511 + ... + 187862.

Almost surely, 2^66065648 is an apocalyptic number.

It is an amenable number.

66065648 is an abundant number, since it is smaller than the sum of its proper divisors (73573480).

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

66065648 is a wasteful number, since it uses less digits than its factorization.

66065648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375392 (or 375386 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 66065648 is about 8128.0777555336. The cubic root of 66065648 is about 404.2579472198.

The spelling of 66065648 in words is "sixty-six million, sixty-five thousand, six hundred forty-eight".