6564966808825 has 24 divisors (see below), whose sum is σ = 8210178086400. Its totient is φ = 5207186712000.

The previous prime is 6564966808759. The next prime is 6564966808837. The reversal of 6564966808825 is 5288086694656.

It is a happy number.

It is not a de Polignac number, because 6564966808825 - 2¹¹ = 6564966806777 is a prime.

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, 426600 + ... + 3648550.

It is an arithmetic number, because the mean of its divisors is an integer number (342090753600).

Almost surely, 2^{6564966808825} is an apocalyptic number.

It is an amenable number.

6564966808825 is a deficient number, since it is larger than the sum of its proper divisors (1645211277575).

6564966808825 is a wasteful number, since it uses less digits than its factorization.

6564966808825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3222657 (or 3222652 counting only the distinct ones).

The product of its (nonzero) digits is 1194393600, while the sum is 73.

The spelling of 6564966808825 in words is "six trillion, five hundred sixty-four billion, nine hundred sixty-six million, eight hundred eight thousand, eight hundred twenty-five".