850668865 has 8 divisors (see below), whose sum is σ = 1080849960. Its totient is φ = 640503552.

The previous prime is 850668857. The next prime is 850668877. The reversal of 850668865 is 568866058.

It can be written as a sum of positive squares in 4 ways, for example, as 277688896 + 572979969 = 16664^2 + 23937^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 850668865 - 2³ = 850668857 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 5003850 + ... + 5004019.

It is an arithmetic number, because the mean of its divisors is an integer number (135106245).

Almost surely, 2^850668865 is an apocalyptic number.

850668865 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

850668865 is a deficient number, since it is larger than the sum of its proper divisors (230181095).

850668865 is a wasteful number, since it uses less digits than its factorization.

850668865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10007891.

The product of its (nonzero) digits is 2764800, while the sum is 52.

The square root of 850668865 is about 29166.2281586084. The cubic root of 850668865 is about 947.5166404997.

The spelling of 850668865 in words is "eight hundred fifty million, six hundred sixty-eight thousand, eight hundred sixty-five".