66847328 has 12 divisors (see below), whose sum is σ = 131605740. Its totient is φ = 33423648.

The previous prime is 66847289. The next prime is 66847337. The reversal of 66847328 is 82374866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1044458 + ... + 1044521.

It is an arithmetic number, because the mean of its divisors is an integer number (10967145).

Almost surely, 2^66847328 is an apocalyptic number.

It is an amenable number.

66847328 is a deficient number, since it is larger than the sum of its proper divisors (64758412).

66847328 is a wasteful number, since it uses less digits than its factorization.

66847328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088989 (or 2088981 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 66847328 is about 8176.0215263904. The cubic root of 66847328 is about 405.8460755861.

The spelling of 66847328 in words is "sixty-six million, eight hundred forty-seven thousand, three hundred twenty-eight".