8145666 has 12 divisors (see below), whose sum is σ = 17648982. Its totient is φ = 2715216.

The previous prime is 8145649. The next prime is 8145671. The reversal of 8145666 is 6665418.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 2313441 = 2415^2 + 1521^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8145666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226251 + ... + 226286.

Almost surely, 2^8145666 is an apocalyptic number.

8145666 is an abundant number, since it is smaller than the sum of its proper divisors (9503316).

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

8145666 is a wasteful number, since it uses less digits than its factorization.

8145666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452545 (or 452542 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 8145666 is about 2854.0613167905. The cubic root of 8145666 is about 201.2065894049.

The spelling of 8145666 in words is "eight million, one hundred forty-five thousand, six hundred sixty-six".