489735666 has 64 divisors (see below), whose sum is σ = 1251129600. Its totient is φ = 139097088.

The previous prime is 489735661. The next prime is 489735667. The reversal of 489735666 is 666537984.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (489735661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61650 + ... + 69138.

It is an arithmetic number, because the mean of its divisors is an integer number (19548900).

Almost surely, 2^489735666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489735666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625564800).

489735666 is an abundant number, since it is smaller than the sum of its proper divisors (761393934).

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

489735666 is a wasteful number, since it uses less digits than its factorization.

489735666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 7674 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 489735666 is about 22129.9721192775. The cubic root of 489735666 is about 788.2317262360.

The spelling of 489735666 in words is "four hundred eighty-nine million, seven hundred thirty-five thousand, six hundred sixty-six".