6566923863 has 24 divisors (see below), whose sum is σ = 10193449968. Its totient is φ = 4058917632.

The previous prime is 6566923859. The next prime is 6566923871. The reversal of 6566923863 is 3683296656.

It is not a de Polignac number, because 6566923863 - 2² = 6566923859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566923663) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 310056 + ... + 330557.

It is an arithmetic number, because the mean of its divisors is an integer number (424727082).

Almost surely, 2^6566923863 is an apocalyptic number.

6566923863 is a deficient number, since it is larger than the sum of its proper divisors (3626526105).

6566923863 is a wasteful number, since it uses less digits than its factorization.

6566923863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640703 (or 640700 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The square root of 6566923863 is about 81036.5588052701. The cubic root of 6566923863 is about 1872.6386974886.

The spelling of 6566923863 in words is "six billion, five hundred sixty-six million, nine hundred twenty-three thousand, eight hundred sixty-three".