3666666 has 8 divisors (see below), whose sum is σ = 7333344. Its totient is φ = 1222220.

The previous prime is 3666661. The next prime is 3666703. The reversal of 3666666 is 6666663.

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

3666666 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

3666666 is a modest number, since divided by 6666 gives 366 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (3666661) 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, 305550 + ... + 305561.

It is an arithmetic number, because the mean of its divisors is an integer number (916668).

Almost surely, 2^3666666 is an apocalyptic number.

3666666 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.

3666666 is a wasteful number, since it uses less digits than its factorization.

3666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611116.

The product of its digits is 139968, while the sum is 39.

The square root of 3666666 is about 1914.8540414350. The cubic root of 3666666 is about 154.2021576272.

The spelling of 3666666 in words is "three million, six hundred sixty-six thousand, six hundred sixty-six".