5663601 has 28 divisors (see below), whose sum is σ = 9010692. Its totient is φ = 3545856.

The previous prime is 5663597. The next prime is 5663611. The reversal of 5663601 is 1063665.

5663601 is a `hidden beast` number, since 56 + 6 + 3 + 601 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 998001 = 2160^2 + 999^2 .

It is not a de Polignac number, because 5663601 - 2² = 5663597 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5663611) 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 27 ways as a sum of consecutive naturals, for example, 12165 + ... + 12621.

Almost surely, 2^5663601 is an apocalyptic number.

5663601 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5663601 is a deficient number, since it is larger than the sum of its proper divisors (3347091).

5663601 is an equidigital number, since it uses as much as digits as its factorization.

5663601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 5663601 is about 2379.8321369374. The cubic root of 5663601 is about 178.2505519268.

The spelling of 5663601 in words is "five million, six hundred sixty-three thousand, six hundred one".