5663645 has 8 divisors (see below), whose sum is σ = 7319256. Its totient is φ = 4182336.

The previous prime is 5663611. The next prime is 5663657. The reversal of 5663645 is 5463665.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 5508409 = 394^2 + 2347^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5663645 - 2⁸ = 5663389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43502 + ... + 43631.

It is an arithmetic number, because the mean of its divisors is an integer number (914907).

Almost surely, 2^5663645 is an apocalyptic number.

It is an amenable number.

5663645 is a deficient number, since it is larger than the sum of its proper divisors (1655611).

5663645 is a wasteful number, since it uses less digits than its factorization.

5663645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87151.

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

The square root of 5663645 is about 2379.8413812689. The cubic root of 5663645 is about 178.2510135297.

The spelling of 5663645 in words is "five million, six hundred sixty-three thousand, six hundred forty-five".