5665749 has 16 divisors (see below), whose sum is σ = 7857024. Its totient is φ = 3628800.

The previous prime is 5665747. The next prime is 5665783. The reversal of 5665749 is 9475665.

It is not a de Polignac number, because 5665749 - 2¹ = 5665747 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5665749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8664 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (491064).

Almost surely, 2^5665749 is an apocalyptic number.

It is an amenable number.

5665749 is a deficient number, since it is larger than the sum of its proper divisors (2191275).

5665749 is a wasteful number, since it uses less digits than its factorization.

5665749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its digits is 226800, while the sum is 42.

The square root of 5665749 is about 2380.2833864899. The cubic root of 5665749 is about 178.2730837513.

The spelling of 5665749 in words is "five million, six hundred sixty-five thousand, seven hundred forty-nine".