65680028 has 6 divisors (see below), whose sum is σ = 114940056. Its totient is φ = 32840012.

The previous prime is 65679989. The next prime is 65680031. The reversal of 65680028 is 82008656.

It is a self number, because there is not a number n which added to its sum of digits gives 65680028.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210000 + ... + 8210007.

It is an arithmetic number, because the mean of its divisors is an integer number (19156676).

Almost surely, 2^65680028 is an apocalyptic number.

It is an amenable number.

65680028 is a deficient number, since it is larger than the sum of its proper divisors (49260028).

65680028 is a wasteful number, since it uses less digits than its factorization.

65680028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16420011 (or 16420009 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 65680028 is about 8104.3215632155. The cubic root of 65680028 is about 403.4698712806.

The spelling of 65680028 in words is "sixty-five million, six hundred eighty thousand, twenty-eight".