4066686 has 40 divisors (see below), whose sum is σ = 9818424. Its totient is φ = 1250640.

The previous prime is 4066679. The next prime is 4066691. The reversal of 4066686 is 6866604.

It is a self number, because there is not a number n which added to its sum of digits gives 4066686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1141 + ... + 3071.

Almost surely, 2^4066686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4066686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4909212).

4066686 is an abundant number, since it is smaller than the sum of its proper divisors (5751738).

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

4066686 is a wasteful number, since it uses less digits than its factorization.

4066686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1949 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 4066686 is about 2016.6025885137. The cubic root of 4066686 is about 159.6173930957.

The spelling of 4066686 in words is "four million, sixty-six thousand, six hundred eighty-six".