805066871 has 4 divisors (see below), whose sum is σ = 920076432. Its totient is φ = 690057312.

The previous prime is 805066819. The next prime is 805066877. The reversal of 805066871 is 178660508.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 805066871 - 2¹⁰ = 805065847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805066877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57504770 + ... + 57504783.

It is an arithmetic number, because the mean of its divisors is an integer number (230019108).

Almost surely, 2^805066871 is an apocalyptic number.

805066871 is a deficient number, since it is larger than the sum of its proper divisors (115009561).

805066871 is a wasteful number, since it uses less digits than its factorization.

805066871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115009560.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 805066871 is about 28373.7003402799. The cubic root of 805066871 is about 930.2735045571.

The spelling of 805066871 in words is "eight hundred five million, sixty-six thousand, eight hundred seventy-one".