499956666 has 64 divisors (see below), whose sum is σ = 1110412800. Its totient is φ = 148808000.

The previous prime is 499956659. The next prime is 499956707. The reversal of 499956666 is 666659994.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 1193005 + ... + 1193423.

It is an arithmetic number, because the mean of its divisors is an integer number (17350200).

Almost surely, 2^499956666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499956666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555206400).

499956666 is an abundant number, since it is smaller than the sum of its proper divisors (610456134).

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

499956666 is a wasteful number, since it uses less digits than its factorization.

499956666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715.

The product of its digits is 18895680, while the sum is 60.

The square root of 499956666 is about 22359.7107763048. The cubic root of 499956666 is about 793.6775958426.

The spelling of 499956666 in words is "four hundred ninety-nine million, nine hundred fifty-six thousand, six hundred sixty-six".