4921208866 has 12 divisors (see below), whose sum is σ = 8587007478. Its totient is φ = 2109089472.

The previous prime is 4921208849. The next prime is 4921208879. The reversal of 4921208866 is 6688021294.

It can be written as a sum of positive squares in only one way, i.e., 3069714025 + 1851494841 = 55405^2 + 43029^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25108111 + ... + 25108306.

Almost surely, 2^4921208866 is an apocalyptic number.

4921208866 is a deficient number, since it is larger than the sum of its proper divisors (3665798612).

4921208866 is a wasteful number, since it uses less digits than its factorization.

4921208866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50216433 (or 50216426 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 4921208866 is about 70151.3283266967. The cubic root of 4921208866 is about 1700.9462858503.

The spelling of 4921208866 in words is "four billion, nine hundred twenty-one million, two hundred eight thousand, eight hundred sixty-six".