499988866 has 20 divisors (see below), whose sum is σ = 812572542. Its totient is φ = 230737728.

The previous prime is 499988861. The next prime is 499988869. The reversal of 499988866 is 668889994.

It can be written as a sum of positive squares in 5 ways, for example, as 15768841 + 484220025 = 3971^2 + 22005^2 .

It is a super-2 number, since 2×499988866² = 499977732247931912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499988861) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 52746 + ... + 61498.

Almost surely, 2^499988866 is an apocalyptic number.

499988866 is a deficient number, since it is larger than the sum of its proper divisors (312583676).

499988866 is an frugal number, since it uses more digits than its factorization.

499988866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8807 (or 8768 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 67.

The square root of 499988866 is about 22360.4308098033. The cubic root of 499988866 is about 793.6946345659.

The spelling of 499988866 in words is "four hundred ninety-nine million, nine hundred eighty-eight thousand, eight hundred sixty-six".