5791666 has 4 divisors (see below), whose sum is σ = 8687502. Its totient is φ = 2895832.

The previous prime is 5791661. The next prime is 5791673. The reversal of 5791666 is 6661975.

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., 3478225 + 2313441 = 1865^2 + 1521^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (5791661) 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 as a sum of consecutive naturals, namely, 1447915 + ... + 1447918.

Almost surely, 2^5791666 is an apocalyptic number.

5791666 is a deficient number, since it is larger than the sum of its proper divisors (2895836).

5791666 is a wasteful number, since it uses less digits than its factorization.

5791666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895835.

The product of its digits is 68040, while the sum is 40.

The square root of 5791666 is about 2406.5880411903. The cubic root of 5791666 is about 179.5840808439.

The spelling of 5791666 in words is "five million, seven hundred ninety-one thousand, six hundred sixty-six".