487855989666 has 64 divisors (see below), whose sum is σ = 1115286624000. Its totient is φ = 157959030528.

The previous prime is 487855989661. The next prime is 487855989679. The reversal of 487855989666 is 666989558784.

It is not an unprimeable number, because it can be changed into a prime (487855989661) 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, 992986 + ... + 1400618.

It is an arithmetic number, because the mean of its divisors is an integer number (17426353500).

Almost surely, 2^487855989666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 487855989666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557643312000).

487855989666 is an abundant number, since it is smaller than the sum of its proper divisors (627430634334).

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

487855989666 is a wasteful number, since it uses less digits than its factorization.

487855989666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408280 (or 408274 counting only the distinct ones).

The product of its digits is 6270566400, while the sum is 81.

The spelling of 487855989666 in words is "four hundred eighty-seven billion, eight hundred fifty-five million, nine hundred eighty-nine thousand, six hundred sixty-six".