5736661 has 4 divisors (see below), whose sum is σ = 6556192. Its totient is φ = 4917132.

The previous prime is 5736659. The next prime is 5736691. The reversal of 5736661 is 1666375.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 5736661 - 2¹ = 5736659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5736611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409755 + ... + 409768.

It is an arithmetic number, because the mean of its divisors is an integer number (1639048).

Almost surely, 2^5736661 is an apocalyptic number.

It is an amenable number.

5736661 is a deficient number, since it is larger than the sum of its proper divisors (819531).

5736661 is an equidigital number, since it uses as much as digits as its factorization.

5736661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819530.

The product of its digits is 22680, while the sum is 34.

The square root of 5736661 is about 2395.1327729377. The cubic root of 5736661 is about 179.0137521555.

The spelling of 5736661 in words is "five million, seven hundred thirty-six thousand, six hundred sixty-one".