1806065664 has 112 divisors (see below), whose sum is σ = 5187250992. Its totient is φ = 555614208.

The previous prime is 1806065623. The next prime is 1806065687. The reversal of 1806065664 is 4665606081.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 316662 + ... + 322314.

It is an arithmetic number, because the mean of its divisors is an integer number (46314741).

Almost surely, 2^1806065664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806065664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2593625496).

1806065664 is an abundant number, since it is smaller than the sum of its proper divisors (3381185328).

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

1806065664 is an equidigital number, since it uses as much as digits as its factorization.

1806065664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695 (or 5671 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 1806065664 is about 42497.8312858433. The cubic root of 1806065664 is about 1217.8052595113.

The spelling of 1806065664 in words is "one billion, eight hundred six million, sixty-five thousand, six hundred sixty-four".