5663651 has 4 divisors (see below), whose sum is σ = 6472752. Its totient is φ = 4854552.

The previous prime is 5663611. The next prime is 5663657. The reversal of 5663651 is 1563665.

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

It is a cyclic number.

It is not a de Polignac number, because 5663651 - 2¹⁴ = 5647267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5663657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404540 + ... + 404553.

It is an arithmetic number, because the mean of its divisors is an integer number (1618188).

Almost surely, 2^5663651 is an apocalyptic number.

5663651 is a deficient number, since it is larger than the sum of its proper divisors (809101).

5663651 is an equidigital number, since it uses as much as digits as its factorization.

5663651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809100.

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

The square root of 5663651 is about 2379.8426418568. The cubic root of 5663651 is about 178.2510764753.

The spelling of 5663651 in words is "five million, six hundred sixty-three thousand, six hundred fifty-one".