3566666 has 4 divisors (see below), whose sum is σ = 5350002. Its totient is φ = 1783332.

The previous prime is 3566659. The next prime is 3566669. The reversal of 3566666 is 6666653.

3566666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6666653 = 7 ⋅952379.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 958441 = 1615^2 + 979^2 .

It is a super-2 number, since 2×3566666² = 25442212711112, which contains 22 as substring.

3566666 is a modest number, since divided by 6666 gives 356 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (3566669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 891665 + ... + 891668.

Almost surely, 2^3566666 is an apocalyptic number.

3566666 is a deficient number, since it is larger than the sum of its proper divisors (1783336).

3566666 is a wasteful number, since it uses less digits than its factorization.

3566666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783335.

The product of its digits is 116640, while the sum is 38.

The square root of 3566666 is about 1888.5618867276. The cubic root of 3566666 is about 152.7873789179.

The spelling of 3566666 in words is "three million, five hundred sixty-six thousand, six hundred sixty-six".