6566516425 has 24 divisors (see below), whose sum is σ = 9309796992. Its totient is φ = 4500768000.

The previous prime is 6566516389. The next prime is 6566516431. The reversal of 6566516425 is 5246156656.

It is not a de Polignac number, because 6566516425 - 2⁹ = 6566515913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 467505 + ... + 481345.

It is an arithmetic number, because the mean of its divisors is an integer number (387908208).

Almost surely, 2^6566516425 is an apocalyptic number.

It is an amenable number.

6566516425 is a deficient number, since it is larger than the sum of its proper divisors (2743280567).

6566516425 is a wasteful number, since it uses less digits than its factorization.

6566516425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16569 (or 16564 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

The square root of 6566516425 is about 81034.0448515314. The cubic root of 6566516425 is about 1872.5999680438.

The spelling of 6566516425 in words is "six billion, five hundred sixty-six million, five hundred sixteen thousand, four hundred twenty-five".