2805582066 has 64 divisors (see below), whose sum is σ = 6826291200. Its totient is φ = 750854016.

The previous prime is 2805582049. The next prime is 2805582077. The reversal of 2805582066 is 6602855082.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51271 + ... + 90773.

It is an arithmetic number, because the mean of its divisors is an integer number (106660800).

Almost surely, 2^2805582066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2805582066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3413145600).

2805582066 is an abundant number, since it is smaller than the sum of its proper divisors (4020709134).

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

2805582066 is a wasteful number, since it uses less digits than its factorization.

2805582066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39623.

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 2805582066 is about 52967.7455249891. The cubic root of 2805582066 is about 1410.3957553151.

The spelling of 2805582066 in words is "two billion, eight hundred five million, five hundred eighty-two thousand, sixty-six".