4991985066 has 16 divisors (see below), whose sum is σ = 9985496544. Its totient is φ = 1663740624.

The previous prime is 4991985001. The next prime is 4991985091. The reversal of 4991985066 is 6605891994.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4991984997 and 4991985015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18640 + ... + 101643.

It is an arithmetic number, because the mean of its divisors is an integer number (624093534).

Almost surely, 2^4991985066 is an apocalyptic number.

4991985066 is an abundant number, since it is smaller than the sum of its proper divisors (4993511478).

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

4991985066 is a wasteful number, since it uses less digits than its factorization.

4991985066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127205.

The product of its (nonzero) digits is 4199040, while the sum is 57.

The square root of 4991985066 is about 70653.9812466361. The cubic root of 4991985066 is about 1709.0617684070.

The spelling of 4991985066 in words is "four billion, nine hundred ninety-one million, nine hundred eighty-five thousand, sixty-six".