8366661 has 6 divisors (see below), whose sum is σ = 12085190. Its totient is φ = 5577768.

The previous prime is 8366647. The next prime is 8366663. The reversal of 8366661 is 1666638.

It can be written as a sum of positive squares in only one way, i.e., 5904900 + 2461761 = 2430^2 + 1569^2 .

It is not a de Polignac number, because 8366661 - 2⁵ = 8366629 is a prime.

It is a Duffinian number.

8366661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8366663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 464806 + ... + 464823.

Almost surely, 2^8366661 is an apocalyptic number.

It is an amenable number.

8366661 is a deficient number, since it is larger than the sum of its proper divisors (3718529).

8366661 is a wasteful number, since it uses less digits than its factorization.

8366661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929635 (or 929632 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 8366661 is about 2892.5181071170. The cubic root of 8366661 is about 203.0099811476.

The spelling of 8366661 in words is "eight million, three hundred sixty-six thousand, six hundred sixty-one".