5665640 has 32 divisors (see below), whose sum is σ = 12852000. Its totient is φ = 2247744.

The previous prime is 5665631. The next prime is 5665661. The reversal of 5665640 is 465665.

It is a junction number, because it is equal to n+sod(n) for n = 5665597 and 5665606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5051 + ... + 6069.

It is an arithmetic number, because the mean of its divisors is an integer number (401625).

Almost surely, 2^5665640 is an apocalyptic number.

It is an amenable number.

5665640 is an abundant number, since it is smaller than the sum of its proper divisors (7186360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5665640 is a wasteful number, since it uses less digits than its factorization.

5665640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 5665640 is about 2380.2604899464. The cubic root of 5665640 is about 178.2719405137.

The spelling of 5665640 in words is "five million, six hundred sixty-five thousand, six hundred forty".