6557791925 has 36 divisors (see below), whose sum is σ = 8484287328. Its totient is φ = 5027580000.

The previous prime is 6557791913. The next prime is 6557791931. The reversal of 6557791925 is 5291977556.

It is a happy number.

It is not a de Polignac number, because 6557791925 - 2¹⁰ = 6557790901 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2569400 + ... + 2571950.

It is an arithmetic number, because the mean of its divisors is an integer number (235674648).

Almost surely, 2^6557791925 is an apocalyptic number.

It is an amenable number.

6557791925 is a deficient number, since it is larger than the sum of its proper divisors (1926495403).

6557791925 is a wasteful number, since it uses less digits than its factorization.

6557791925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2694 counting only the distinct ones).

The product of its digits is 5953500, while the sum is 56.

The square root of 6557791925 is about 80980.1946465924. The cubic root of 6557791925 is about 1871.7702668633.

The spelling of 6557791925 in words is "six billion, five hundred fifty-seven million, seven hundred ninety-one thousand, nine hundred twenty-five".