2801816866 has 8 divisors (see below), whose sum is σ = 4233402540. Its totient is φ = 1390682688.

The previous prime is 2801816851. The next prime is 2801816881. The reversal of 2801816866 is 6686181082.

It is an interprime number because it is at equal distance from previous prime (2801816851) and next prime (2801816881).

It can be written as a sum of positive squares in 2 ways, for example, as 2541672225 + 260144641 = 50415^2 + 16129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5112531 + ... + 5113078.

Almost surely, 2^2801816866 is an apocalyptic number.

2801816866 is a deficient number, since it is larger than the sum of its proper divisors (1431585674).

2801816866 is a wasteful number, since it uses less digits than its factorization.

2801816866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10225748.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 2801816866 is about 52932.1912072417. The cubic root of 2801816866 is about 1409.7645375804.

The spelling of 2801816866 in words is "two billion, eight hundred one million, eight hundred sixteen thousand, eight hundred sixty-six".