6566404665051 has 96 divisors (see below), whose sum is σ = 12449915412480. Its totient is φ = 3230983857600.

The previous prime is 6566404664947. The next prime is 6566404665071. The reversal of 6566404665051 is 1505664046656.

6566404665051 is a `hidden beast` number, since 6 + 56 + 6 + 40 + 46 + 6 + 505 + 1 = 666.

It is not a de Polignac number, because 6566404665051 - 2⁷ = 6566404664923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6566404665071) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 75153076 + ... + 75240398.

It is an arithmetic number, because the mean of its divisors is an integer number (129686618880).

Almost surely, 2^{6566404665051} is an apocalyptic number.

6566404665051 is a deficient number, since it is larger than the sum of its proper divisors (5883510747429).

6566404665051 is a wasteful number, since it uses less digits than its factorization.

6566404665051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93077 (or 93074 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 54.

The spelling of 6566404665051 in words is "six trillion, five hundred sixty-six billion, four hundred four million, six hundred sixty-five thousand, fifty-one".