4091566 has 8 divisors (see below), whose sum is σ = 6335424. Its totient is φ = 1979760.

The previous prime is 4091561. The next prime is 4091569. The reversal of 4091566 is 6651904.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32935 + ... + 33058.

It is an arithmetic number, because the mean of its divisors is an integer number (791928).

Almost surely, 2^4091566 is an apocalyptic number.

4091566 is a deficient number, since it is larger than the sum of its proper divisors (2243858).

4091566 is a wasteful number, since it uses less digits than its factorization.

4091566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66026.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4091566 is about 2022.7619731446. The cubic root of 4091566 is about 159.9422447796.

The spelling of 4091566 in words is "four million, ninety-one thousand, five hundred sixty-six".