3566645 has 4 divisors (see below), whose sum is σ = 4279980. Its totient is φ = 2853312.

The previous prime is 3566599. The next prime is 3566659. The reversal of 3566645 is 5466653.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 628849 + 2937796 = 793^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 3566645 - 2²⁰ = 2518069 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 5 + 6³ + 6⁴ + 6⁴ + 4⁷ + 5⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356660 + ... + 356669.

It is an arithmetic number, because the mean of its divisors is an integer number (1069995).

Almost surely, 2^3566645 is an apocalyptic number.

It is an amenable number.

3566645 is a deficient number, since it is larger than the sum of its proper divisors (713335).

3566645 is an equidigital number, since it uses as much as digits as its factorization.

3566645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713334.

The product of its digits is 64800, while the sum is 35.

The square root of 3566645 is about 1888.5563269334. The cubic root of 3566645 is about 152.7870790542.

The spelling of 3566645 in words is "three million, five hundred sixty-six thousand, six hundred forty-five".