5665851 has 12 divisors (see below), whose sum is σ = 8250112. Its totient is φ = 3746736.

The previous prime is 5665837. The next prime is 5665853. The reversal of 5665851 is 1585665.

5665851 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5665851 - 2⁶ = 5665787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5665853) 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 11 ways as a sum of consecutive naturals, for example, 1336 + ... + 3621.

Almost surely, 2^5665851 is an apocalyptic number.

5665851 is a deficient number, since it is larger than the sum of its proper divisors (2584261).

5665851 is a wasteful number, since it uses less digits than its factorization.

5665851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5090 (or 5087 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 5665851 is about 2380.3048124137. The cubic root of 5665851 is about 178.2741535566.

It can be divided in two parts, 5 and 665851, that added together give a square (665856 = 816²).

The spelling of 5665851 in words is "five million, six hundred sixty-five thousand, eight hundred fifty-one".