499930381666 has 8 divisors (see below), whose sum is σ = 749989228140. Its totient is φ = 249933972288.

The previous prime is 499930381661. The next prime is 499930381681. The reversal of 499930381666 is 666183039994.

It can be written as a sum of positive squares in 2 ways, for example, as 480774437641 + 19155944025 = 693379^2 + 138405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 499930381598 and 499930381607.

It is not an unprimeable number, because it can be changed into a prime (499930381661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15589251 + ... + 15621286.

Almost surely, 2^499930381666 is an apocalyptic number.

499930381666 is a deficient number, since it is larger than the sum of its proper divisors (250058846474).

499930381666 is a wasteful number, since it uses less digits than its factorization.

499930381666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31218548.

The product of its (nonzero) digits is 45349632, while the sum is 64.

The spelling of 499930381666 in words is "four hundred ninety-nine billion, nine hundred thirty million, three hundred eighty-one thousand, six hundred sixty-six".