5661550 has 24 divisors (see below), whose sum is σ = 10602000. Its totient is φ = 2249280.

The previous prime is 5661547. The next prime is 5661559. The reversal of 5661550 is 551665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661559) 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 11 ways as a sum of consecutive naturals, for example, 9666 + ... + 10234.

It is an arithmetic number, because the mean of its divisors is an integer number (441750).

Almost surely, 2^5661550 is an apocalyptic number.

5661550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

5661550 is a deficient number, since it is larger than the sum of its proper divisors (4940450).

5661550 is a wasteful number, since it uses less digits than its factorization.

5661550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 5661550 is about 2379.4011851724. The cubic root of 5661550 is about 178.2290322833.

It can be divided in two parts, 56615 and 50, that added together give a palindrome (56665).

The spelling of 5661550 in words is "five million, six hundred sixty-one thousand, five hundred fifty".