6557898725 has 12 divisors (see below), whose sum is σ = 9293479584. Its totient is φ = 4496844720.

The previous prime is 6557898671. The next prime is 6557898749. The reversal of 6557898725 is 5278987556.

It is not a de Polignac number, because 6557898725 - 2²⁸ = 6289463269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18736679 + ... + 18737028.

It is an arithmetic number, because the mean of its divisors is an integer number (774456632).

Almost surely, 2^6557898725 is an apocalyptic number.

It is an amenable number.

6557898725 is a deficient number, since it is larger than the sum of its proper divisors (2735580859).

6557898725 is a wasteful number, since it uses less digits than its factorization.

6557898725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37473724 (or 37473719 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 62.

The square root of 6557898725 is about 80980.8540644022. The cubic root of 6557898725 is about 1871.7804280061.

The spelling of 6557898725 in words is "six billion, five hundred fifty-seven million, eight hundred ninety-eight thousand, seven hundred twenty-five".