8166666 has 16 divisors (see below), whose sum is σ = 16380000. Its totient is φ = 2714448.

The previous prime is 8166659. The next prime is 8166727. The reversal of 8166666 is 6666618.

8166666 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

8166666 is a modest number, since divided by 6666 gives 816 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585 + ... + 4083.

It is an arithmetic number, because the mean of its divisors is an integer number (1023750).

Almost surely, 2^8166666 is an apocalyptic number.

8166666 is an abundant number, since it is smaller than the sum of its proper divisors (8213334).

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

8166666 is a wasteful number, since it uses less digits than its factorization.

8166666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893.

The product of its digits is 62208, while the sum is 39.

The square root of 8166666 is about 2857.7379166047. The cubic root of 8166666 is about 201.3793484530.

The spelling of 8166666 in words is "eight million, one hundred sixty-six thousand, six hundred sixty-six".