680065028 has 6 divisors (see below), whose sum is σ = 1190113806. Its totient is φ = 340032512.

The previous prime is 680065021. The next prime is 680065063. The reversal of 680065028 is 820560086.

It can be written as a sum of positive squares in only one way, i.e., 679749184 + 315844 = 26072^2 + 562^2 .

It is not an unprimeable number, because it can be changed into a prime (680065021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85008125 + ... + 85008132.

It is an arithmetic number, because the mean of its divisors is an integer number (198352301).

Almost surely, 2^680065028 is an apocalyptic number.

It is an amenable number.

680065028 is a deficient number, since it is larger than the sum of its proper divisors (510048778).

680065028 is a wasteful number, since it uses less digits than its factorization.

680065028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170016261 (or 170016259 counting only the distinct ones).

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

The square root of 680065028 is about 26078.0564459854. The cubic root of 680065028 is about 879.3939646205.

The spelling of 680065028 in words is "six hundred eighty million, sixty-five thousand, twenty-eight".