5671666 has 32 divisors (see below), whose sum is σ = 11426688. Its totient is φ = 2039040.

The previous prime is 5671649. The next prime is 5671669. The reversal of 5671666 is 6661765.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5671669) 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, 586 + ... + 3418.

It is an arithmetic number, because the mean of its divisors is an integer number (357084).

Almost surely, 2^5671666 is an apocalyptic number.

5671666 is an abundant number, since it is smaller than the sum of its proper divisors (5755022).

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

5671666 is a wasteful number, since it uses less digits than its factorization.

5671666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866.

The product of its digits is 45360, while the sum is 37.

The square root of 5671666 is about 2381.5259813825. The cubic root of 5671666 is about 178.3351217297.

Subtracting 5671666 from its reverse (6661765), we obtain a palindrome (990099).

The spelling of 5671666 in words is "five million, six hundred seventy-one thousand, six hundred sixty-six".