4006686 has 8 divisors (see below), whose sum is σ = 8013384. Its totient is φ = 1335560.

The previous prime is 4006661. The next prime is 4006687. The reversal of 4006686 is 6866004.

It is a happy number.

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

4006686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333885 + ... + 333896.

It is an arithmetic number, because the mean of its divisors is an integer number (1001673).

Almost surely, 2^4006686 is an apocalyptic number.

4006686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4006686 is a wasteful number, since it uses less digits than its factorization.

4006686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667786.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 4006686 is about 2001.6708021051. The cubic root of 4006686 is about 158.8285006594.

The spelling of 4006686 in words is "four million, six thousand, six hundred eighty-six".