8166091 has 4 divisors (see below), whose sum is σ = 8174800. Its totient is φ = 8157384.

The previous prime is 8166083. The next prime is 8166097. The reversal of 8166091 is 1906618.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8166091 - 2³ = 8166083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8166097) 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, 2751 + ... + 4888.

It is an arithmetic number, because the mean of its divisors is an integer number (2043700).

Almost surely, 2^8166091 is an apocalyptic number.

8166091 is a deficient number, since it is larger than the sum of its proper divisors (8709).

8166091 is a wasteful number, since it uses less digits than its factorization.

8166091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8708.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 8166091 is about 2857.6373107867. The cubic root of 8166091 is about 201.3746220916.

The spelling of 8166091 in words is "eight million, one hundred sixty-six thousand, ninety-one".