499666 has 4 divisors (see below), whose sum is σ = 749502. Its totient is φ = 249832.

The previous prime is 499663. The next prime is 499669. The reversal of 499666 is 666994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666994 = 2 ⋅333497.

It is an interprime number because it is at equal distance from previous prime (499663) and next prime (499669).

It can be written as a sum of positive squares in only one way, i.e., 483025 + 16641 = 695^2 + 129^2 .

It is a super-2 number, since 2×499666² = 499332223112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (499661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124915 + ... + 124918.

2⁴⁹⁹⁶⁶⁶ is an apocalyptic number.

499666 is a deficient number, since it is larger than the sum of its proper divisors (249836).

499666 is a wasteful number, since it uses less digits than its factorization.

499666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249835.

The product of its digits is 69984, while the sum is 40.

The square root of 499666 is about 706.8705680675. The cubic root of 499666 is about 79.3523755967.

The spelling of 499666 in words is "four hundred ninety-nine thousand, six hundred sixty-six".