66289648 has 20 divisors (see below), whose sum is σ = 129210480. Its totient is φ = 32945024.

The previous prime is 66289631. The next prime is 66289669. The reversal of 66289648 is 84698266.

It is a congruent number.

It is an unprimeable number.

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, 9733 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (6460524).

Almost surely, 2^66289648 is an apocalyptic number.

It is an amenable number.

66289648 is a deficient number, since it is larger than the sum of its proper divisors (62920832).

66289648 is a wasteful number, since it uses less digits than its factorization.

66289648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24984 (or 24978 counting only the distinct ones).

The product of its digits is 995328, while the sum is 49.

The square root of 66289648 is about 8141.8454910419. The cubic root of 66289648 is about 404.7143196936.

The spelling of 66289648 in words is "sixty-six million, two hundred eighty-nine thousand, six hundred forty-eight".