5591666 has 8 divisors (see below), whose sum is σ = 8529840. Its totient is φ = 2748388.

The previous prime is 5591653. The next prime is 5591671. The reversal of 5591666 is 6661955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23576 + ... + 23811.

It is an arithmetic number, because the mean of its divisors is an integer number (1066230).

Almost surely, 2^5591666 is an apocalyptic number.

5591666 is a deficient number, since it is larger than the sum of its proper divisors (2938174).

5591666 is a wasteful number, since it uses less digits than its factorization.

5591666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47448.

The product of its digits is 48600, while the sum is 38.

The square root of 5591666 is about 2364.6703787209. The cubic root of 5591666 is about 177.4926638507.

The spelling of 5591666 in words is "five million, five hundred ninety-one thousand, six hundred sixty-six".