5661633 has 4 divisors (see below), whose sum is σ = 7548848. Its totient is φ = 3774420.

The previous prime is 5661631. The next prime is 5661637. The reversal of 5661633 is 3361665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5661633 - 2¹ = 5661631 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

5661633 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5661633.

It is not an unprimeable number, because it can be changed into a prime (5661631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943603 + ... + 943608.

It is an arithmetic number, because the mean of its divisors is an integer number (1887212).

Almost surely, 2^5661633 is an apocalyptic number.

It is an amenable number.

5661633 is a deficient number, since it is larger than the sum of its proper divisors (1887215).

5661633 is a wasteful number, since it uses less digits than its factorization.

5661633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887214.

The product of its digits is 9720, while the sum is 30.

The square root of 5661633 is about 2379.4186264716. The cubic root of 5661633 is about 178.2299032425.

Subtracting from 5661633 its reverse (3361665), we obtain a cube (2299968 = 132³).

The spelling of 5661633 in words is "five million, six hundred sixty-one thousand, six hundred thirty-three".