6566578887 has 24 divisors (see below), whose sum is σ = 9712096240. Its totient is φ = 3943209600.

The previous prime is 6566578877. The next prime is 6566578903. The reversal of 6566578887 is 7888756656.

It is not a de Polignac number, because 6566578887 - 2⁴ = 6566578871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566578807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43414 + ... + 122547.

Almost surely, 2^6566578887 is an apocalyptic number.

6566578887 is a deficient number, since it is larger than the sum of its proper divisors (3145517353).

6566578887 is a wasteful number, since it uses less digits than its factorization.

6566578887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166095 (or 166084 counting only the distinct ones).

The product of its digits is 135475200, while the sum is 66.

The square root of 6566578887 is about 81034.4302565274. The cubic root of 6566578887 is about 1872.6059055384.

The spelling of 6566578887 in words is "six billion, five hundred sixty-six million, five hundred seventy-eight thousand, eight hundred eighty-seven".