657725013 has 12 divisors (see below), whose sum is σ = 1036415328. Its totient is φ = 398621160.

The previous prime is 657724981. The next prime is 657725021. The reversal of 657725013 is 310527756.

It is not a de Polignac number, because 657725013 - 2⁵ = 657724981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657725063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3321745 + ... + 3321942.

It is an arithmetic number, because the mean of its divisors is an integer number (86367944).

Almost surely, 2^657725013 is an apocalyptic number.

It is an amenable number.

657725013 is a deficient number, since it is larger than the sum of its proper divisors (378690315).

657725013 is a wasteful number, since it uses less digits than its factorization.

657725013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643704 (or 6643701 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 657725013 is about 25646.1500619489. The cubic root of 657725013 is about 869.6572450852.

The spelling of 657725013 in words is "six hundred fifty-seven million, seven hundred twenty-five thousand, thirteen".