4989807666 has 48 divisors (see below), whose sum is σ = 11726435448. Its totient is φ = 1527244800.

The previous prime is 4989807661. The next prime is 4989807673. The reversal of 4989807666 is 6667089894.

It can be written as a sum of positive squares in 4 ways, for example, as 2673407025 + 2316400641 = 51705^2 + 48129^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4989807661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186315 + ... + 211406.

Almost surely, 2^4989807666 is an apocalyptic number.

4989807666 is an abundant number, since it is smaller than the sum of its proper divisors (6736627782).

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

4989807666 is a wasteful number, since it uses less digits than its factorization.

4989807666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397787 (or 397784 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The square root of 4989807666 is about 70638.5706678724. The cubic root of 4989807666 is about 1708.8132465445.

The spelling of 4989807666 in words is "four billion, nine hundred eighty-nine million, eight hundred seven thousand, six hundred sixty-six".