5601666 has 32 divisors (see below), whose sum is σ = 13120128. Its totient is φ = 1560960.

The previous prime is 5601643. The next prime is 5601667. The reversal of 5601666 is 6661065.

It is a Smith number, since the sum of its digits (30) 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 (5601667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 96 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (410004).

Almost surely, 2^5601666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5601666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6560064).

5601666 is an abundant number, since it is smaller than the sum of its proper divisors (7518462).

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

5601666 is a wasteful number, since it uses less digits than its factorization.

5601666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 5601666 is about 2366.7838938103. The cubic root of 5601666 is about 177.5984086985.

The spelling of 5601666 in words is "five million, six hundred one thousand, six hundred sixty-six".