8391066 has 16 divisors (see below), whose sum is σ = 17099424. Its totient is φ = 2744144.

The previous prime is 8391037. The next prime is 8391073. The reversal of 8391066 is 6601938.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12876 + ... + 13511.

It is an arithmetic number, because the mean of its divisors is an integer number (1068714).

Almost surely, 2^8391066 is an apocalyptic number.

8391066 is an abundant number, since it is smaller than the sum of its proper divisors (8708358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8391066 is a wasteful number, since it uses less digits than its factorization.

8391066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26445.

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

The square root of 8391066 is about 2896.7336777826. The cubic root of 8391066 is about 203.2071784566.

The spelling of 8391066 in words is "eight million, three hundred ninety-one thousand, sixty-six".