657200000068 has 24 divisors (see below), whose sum is σ = 1201203864000. Its totient is φ = 314299950048.

The previous prime is 657199999999. The next prime is 657200000123. The reversal of 657200000068 is 860000002756.

It is a junction number, because it is equal to n+sod(n) for n = 657199999979 and 657200000042.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37622968 + ... + 37640431.

It is an arithmetic number, because the mean of its divisors is an integer number (50050161000).

Almost surely, 2^657200000068 is an apocalyptic number.

It is an amenable number.

657200000068 is a deficient number, since it is larger than the sum of its proper divisors (544003863932).

657200000068 is a wasteful number, since it uses less digits than its factorization.

657200000068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75263499 (or 75263497 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 657200000068 in words is "six hundred fifty-seven billion, two hundred million, sixty-eight", and thus it is an aban number.