5819666 has 4 divisors (see below), whose sum is σ = 8729502. Its totient is φ = 2909832.

The previous prime is 5819659. The next prime is 5819669. The reversal of 5819666 is 6669185.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5621641 + 198025 = 2371^2 + 445^2 .

It is not an unprimeable number, because it can be changed into a prime (5819669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1454915 + ... + 1454918.

Almost surely, 2^5819666 is an apocalyptic number.

5819666 is a deficient number, since it is larger than the sum of its proper divisors (2909836).

5819666 is a wasteful number, since it uses less digits than its factorization.

5819666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909835.

The product of its digits is 77760, while the sum is 41.

The square root of 5819666 is about 2412.3983916426. The cubic root of 5819666 is about 179.8730174360.

The spelling of 5819666 in words is "five million, eight hundred nineteen thousand, six hundred sixty-six".