800664427784 has 24 divisors (see below), whose sum is σ = 1625609362410. Its totient is φ = 369537427584.

The previous prime is 800664427729. The next prime is 800664427799. The reversal of 800664427784 is 487724466008.

It can be written as a sum of positive squares in 3 ways, for example, as 268450406884 + 532214020900 = 518122^2 + 729530^2 .

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 5 ways as a sum of consecutive naturals, for example, 296102357 + ... + 296105060.

Almost surely, 2^800664427784 is an apocalyptic number.

It is an amenable number.

800664427784 is an abundant number, since it is smaller than the sum of its proper divisors (824944934626).

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

800664427784 is a wasteful number, since it uses less digits than its factorization.

800664427784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592207449 (or 592207432 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 56.

The spelling of 800664427784 in words is "eight hundred billion, six hundred sixty-four million, four hundred twenty-seven thousand, seven hundred eighty-four".