8266661 has 8 divisors (see below), whose sum is σ = 9036384. Its totient is φ = 7516080.

The previous prime is 8266633. The next prime is 8266663. The reversal of 8266661 is 1666628.

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

It is not a de Polignac number, because 8266661 - 2⁶ = 8266597 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 (8266663) by changing a digit.

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, 3875 + ... + 5616.

It is an arithmetic number, because the mean of its divisors is an integer number (1129548).

Almost surely, 2^8266661 is an apocalyptic number.

It is an amenable number.

8266661 is a deficient number, since it is larger than the sum of its proper divisors (769723).

8266661 is a wasteful number, since it uses less digits than its factorization.

8266661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9571.

The product of its digits is 20736, while the sum is 35.

The square root of 8266661 is about 2875.1801682677. The cubic root of 8266661 is about 202.1979319915.

The spelling of 8266661 in words is "eight million, two hundred sixty-six thousand, six hundred sixty-one".