5661761 has 8 divisors (see below), whose sum is σ = 6608640. Its totient is φ = 4749408.

The previous prime is 5661743. The next prime is 5661779. The reversal of 5661761 is 1671665.

It is an interprime number because it is at equal distance from previous prime (5661743) and next prime (5661779).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5661761 - 2¹⁸ = 5399617 is a prime.

It is a super-2 number, since 2×5661761² = 64111075242242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8276 + ... + 8933.

It is an arithmetic number, because the mean of its divisors is an integer number (826080).

Almost surely, 2^5661761 is an apocalyptic number.

It is an amenable number.

5661761 is a deficient number, since it is larger than the sum of its proper divisors (946879).

5661761 is a wasteful number, since it uses less digits than its factorization.

5661761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17263.

The product of its digits is 7560, while the sum is 32.

The square root of 5661761 is about 2379.4455236462. The cubic root of 5661761 is about 178.2312463919.

The spelling of 5661761 in words is "five million, six hundred sixty-one thousand, seven hundred sixty-one".