657064 has 16 divisors (see below), whose sum is σ = 1285920. Its totient is φ = 314160.

The previous prime is 657061. The next prime is 657071. The reversal of 657064 is 460756.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1602 + ... + 1969.

It is an arithmetic number, because the mean of its divisors is an integer number (80370).

2⁶⁵⁷⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

657064 is a deficient number, since it is larger than the sum of its proper divisors (628856).

657064 is a wasteful number, since it uses less digits than its factorization.

657064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600 (or 3596 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 657064 is about 810.5948433095. The cubic root of 657064 is about 86.9365812538.

The spelling of 657064 in words is "six hundred fifty-seven thousand, sixty-four".