6566003816 has 32 divisors (see below), whose sum is σ = 12397848960. Its totient is φ = 3259948032.

The previous prime is 6566003777. The next prime is 6566003861. The reversal of 6566003816 is 6183006656.

It is a super-2 number, since 2×6566003816² = 86224812223453123712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2754161 + ... + 2756543.

It is an arithmetic number, because the mean of its divisors is an integer number (387432780).

Almost surely, 2^6566003816 is an apocalyptic number.

It is an amenable number.

6566003816 is a deficient number, since it is larger than the sum of its proper divisors (5831845144).

6566003816 is a wasteful number, since it uses less digits than its factorization.

6566003816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665 (or 4661 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 6566003816 is about 81030.8818661132. The cubic root of 6566003816 is about 1872.5512391839.

The spelling of 6566003816 in words is "six billion, five hundred sixty-six million, three thousand, eight hundred sixteen".