499999660 has 12 divisors (see below), whose sum is σ = 1049999328. Its totient is φ = 199999856.

The previous prime is 499999613. The next prime is 499999693. The reversal of 499999660 is 66999994.

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 3 ways as a sum of consecutive naturals, for example, 12499972 + ... + 12500011.

It is an arithmetic number, because the mean of its divisors is an integer number (87499944).

Almost surely, 2^499999660 is an apocalyptic number.

It is an amenable number.

499999660 is an abundant number, since it is smaller than the sum of its proper divisors (549999668).

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

499999660 is a wasteful number, since it uses less digits than its factorization.

499999660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24999992 (or 24999990 counting only the distinct ones).

The product of its (nonzero) digits is 8503056, while the sum is 61.

The square root of 499999660 is about 22360.6721723655. The cubic root of 499999660 is about 793.7003460786.

The spelling of 499999660 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred sixty".