657063738 has 56 divisors (see below), whose sum is σ = 1555557600. Its totient is φ = 207485064.

The previous prime is 657063731. The next prime is 657063751. The reversal of 657063738 is 837360756.

657063738 is a `hidden beast` number, since 6 + 5 + 7 + 0 + 637 + 3 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 657063693 and 657063702.

It is not an unprimeable number, because it can be changed into a prime (657063731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15843 + ... + 39561.

Almost surely, 2^657063738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 657063738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777778800).

657063738 is an abundant number, since it is smaller than the sum of its proper divisors (898493862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

657063738 is a wasteful number, since it uses less digits than its factorization.

657063738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23758 (or 23743 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 657063738 is about 25633.2545339058. The cubic root of 657063738 is about 869.3656969864.

The spelling of 657063738 in words is "six hundred fifty-seven million, sixty-three thousand, seven hundred thirty-eight".