499999866 has 16 divisors (see below), whose sum is σ = 1016949600. Its totient is φ = 163841648.

The previous prime is 499999853. The next prime is 499999873. The reversal of 499999866 is 668999994.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 499999866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705861 + ... + 706568.

It is an arithmetic number, because the mean of its divisors is an integer number (63559350).

Almost surely, 2^499999866 is an apocalyptic number.

499999866 is an abundant number, since it is smaller than the sum of its proper divisors (516949734).

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

499999866 is a wasteful number, since it uses less digits than its factorization.

499999866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412493.

The product of its digits is 68024448, while the sum is 69.

The square root of 499999866 is about 22360.6767786666. The cubic root of 499999866 is about 793.7004550802.

The spelling of 499999866 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred sixty-six".