5503661 has 2 divisors, whose sum is σ = 5503662. Its totient is φ = 5503660.

The previous prime is 5503657. The next prime is 5503721. The reversal of 5503661 is 1663055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4515625 + 988036 = 2125^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 5503661 - 2² = 5503657 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5503661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5503621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2751830 + 2751831.

It is an arithmetic number, because the mean of its divisors is an integer number (2751831).

Almost surely, 2^5503661 is an apocalyptic number.

It is an amenable number.

5503661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5503661 is an equidigital number, since it uses as much as digits as its factorization.

5503661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 5503661 is about 2345.9882778906. The cubic root of 5503661 is about 176.5565735500.

Subtracting from 5503661 its reverse (1663055), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5503661 in words is "five million, five hundred three thousand, six hundred sixty-one".