5661765 has 32 divisors (see below), whose sum is σ = 10661760. Its totient is φ = 2840832.

The previous prime is 5661743. The next prime is 5661779. The reversal of 5661765 is 5671665.

It is a happy number.

It is not a de Polignac number, because 5661765 - 2⁷ = 5661637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1062 + ... + 3528.

It is an arithmetic number, because the mean of its divisors is an integer number (333180).

Almost surely, 2^5661765 is an apocalyptic number.

It is an amenable number.

5661765 is a deficient number, since it is larger than the sum of its proper divisors (4999995).

5661765 is a wasteful number, since it uses less digits than its factorization.

5661765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498 (or 2492 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 5661765 is about 2379.4463641780. The cubic root of 5661765 is about 178.2312883650.

The spelling of 5661765 in words is "five million, six hundred sixty-one thousand, seven hundred sixty-five".