6489565566 has 32 divisors (see below), whose sum is σ = 14218329600. Its totient is φ = 1958302080.

The previous prime is 6489565543. The next prime is 6489565609. The reversal of 6489565566 is 6655659846.

It is a super-2 number, since 2×6489565566² = 84228922470825800712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189931 + ... + 221478.

It is an arithmetic number, because the mean of its divisors is an integer number (444322800).

Almost surely, 2^6489565566 is an apocalyptic number.

6489565566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6489565566 is an abundant number, since it is smaller than the sum of its proper divisors (7728764034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6489565566 is a wasteful number, since it uses less digits than its factorization.

6489565566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411664.

The product of its digits is 46656000, while the sum is 60.

The square root of 6489565566 is about 80557.8398791825. The cubic root of 6489565566 is about 1865.2564117358.

The spelling of 6489565566 in words is "six billion, four hundred eighty-nine million, five hundred sixty-five thousand, five hundred sixty-six".