657068 has 6 divisors (see below), whose sum is σ = 1149876. Its totient is φ = 328532.

The previous prime is 657061. The next prime is 657071. The reversal of 657068 is 860756.

Added to its reverse (860756) it gives a square (1517824 = 1232²).

It is not an unprimeable number, because it can be changed into a prime (657061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82130 + ... + 82137.

It is an arithmetic number, because the mean of its divisors is an integer number (191646).

2⁶⁵⁷⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

657068 is a deficient number, since it is larger than the sum of its proper divisors (492808).

657068 is a wasteful number, since it uses less digits than its factorization.

657068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164271 (or 164269 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 657068 is about 810.5973106296. The cubic root of 657068 is about 86.9367576676.

Adding to 657068 its reverse (860756), we get a square (1517824 = 1232²).

The spelling of 657068 in words is "six hundred fifty-seven thousand, sixty-eight".