3996666 has 48 divisors (see below), whose sum is σ = 9443304. Its totient is φ = 1216512.

The previous prime is 3996653. The next prime is 3996743. The reversal of 3996666 is 6666993.

It can be written as a sum of positive squares in 4 ways, for example, as 3980025 + 16641 = 1995^2 + 129^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11146 + ... + 11498.

Almost surely, 2^3996666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3996666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4721652).

3996666 is an abundant number, since it is smaller than the sum of its proper divisors (5446638).

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

3996666 is a wasteful number, since it uses less digits than its factorization.

3996666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 412 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 3996666 is about 1999.1663262470. The cubic root of 3996666 is about 158.6959896452.

The spelling of 3996666 in words is "three million, nine hundred ninety-six thousand, six hundred sixty-six".