8066391 has 4 divisors (see below), whose sum is σ = 10755192. Its totient is φ = 5377592.

The previous prime is 8066389. The next prime is 8066411. The reversal of 8066391 is 1936608.

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

It is a cyclic number.

It is not a de Polignac number, because 8066391 - 2¹ = 8066389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8066341) 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, 1344396 + ... + 1344401.

It is an arithmetic number, because the mean of its divisors is an integer number (2688798).

Almost surely, 2^8066391 is an apocalyptic number.

8066391 is a deficient number, since it is larger than the sum of its proper divisors (2688801).

8066391 is a wasteful number, since it uses less digits than its factorization.

8066391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688800.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 8066391 is about 2840.1392571492. The cubic root of 8066391 is about 200.5517348768.

The spelling of 8066391 in words is "eight million, sixty-six thousand, three hundred ninety-one".