657434685 has 32 divisors (see below), whose sum is σ = 1083018240. Its totient is φ = 340305408.

The previous prime is 657434651. The next prime is 657434689. The reversal of 657434685 is 586434756.

It is not a de Polignac number, because 657434685 - 2¹¹ = 657432637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657434689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264609 + ... + 267081.

It is an arithmetic number, because the mean of its divisors is an integer number (33844320).

Almost surely, 2^657434685 is an apocalyptic number.

It is an amenable number.

657434685 is a deficient number, since it is larger than the sum of its proper divisors (425583555).

657434685 is a wasteful number, since it uses less digits than its factorization.

657434685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2997.

The product of its digits is 2419200, while the sum is 48.

The square root of 657434685 is about 25640.4891724007. The cubic root of 657434685 is about 869.5292670788.

The spelling of 657434685 in words is "six hundred fifty-seven million, four hundred thirty-four thousand, six hundred eighty-five".