5665690 has 16 divisors (see below), whose sum is σ = 10228680. Its totient is φ = 2259520.

The previous prime is 5665687. The next prime is 5665691. The reversal of 5665690 is 965665.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5396329 + 269361 = 2323^2 + 519^2 .

It is a super-2 number, since 2×5665690² = 64200086352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5665691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3996 + ... + 5224.

Almost surely, 2^5665690 is an apocalyptic number.

5665690 is a deficient number, since it is larger than the sum of its proper divisors (4562990).

5665690 is a wasteful number, since it uses less digits than its factorization.

5665690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 5665690 is about 2380.2709929754. The cubic root of 5665690 is about 178.2724649364.

The spelling of 5665690 in words is "five million, six hundred sixty-five thousand, six hundred ninety".