3651566 has 16 divisors (see below), whose sum is σ = 5838480. Its totient is φ = 1706880.

The previous prime is 3651559. The next prime is 3651607. The reversal of 3651566 is 6651563.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 6920 + ... + 7428.

It is an arithmetic number, because the mean of its divisors is an integer number (364905).

Almost surely, 2^3651566 is an apocalyptic number.

3651566 is a deficient number, since it is larger than the sum of its proper divisors (2186914).

3651566 is a wasteful number, since it uses less digits than its factorization.

3651566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its digits is 16200, while the sum is 32.

The square root of 3651566 is about 1910.9071144354. The cubic root of 3651566 is about 153.9901888392.

The spelling of 3651566 in words is "three million, six hundred fifty-one thousand, five hundred sixty-six".