2806166945 has 4 divisors (see below), whose sum is σ = 3367400340. Its totient is φ = 2244933552.

The previous prime is 2806166941. The next prime is 2806166947. The reversal of 2806166945 is 5496616082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 576816289 + 2229350656 = 24017^2 + 47216^2 .

It is a cyclic number.

It is not a de Polignac number, because 2806166945 - 2² = 2806166941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2806166945.

It is not an unprimeable number, because it can be changed into a prime (2806166941) 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, 280616690 + ... + 280616699.

It is an arithmetic number, because the mean of its divisors is an integer number (841850085).

Almost surely, 2^2806166945 is an apocalyptic number.

It is an amenable number.

2806166945 is a deficient number, since it is larger than the sum of its proper divisors (561233395).

2806166945 is an equidigital number, since it uses as much as digits as its factorization.

2806166945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561233394.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 2806166945 is about 52973.2663236844. The cubic root of 2806166945 is about 1410.4937567902.

The spelling of 2806166945 in words is "two billion, eight hundred six million, one hundred sixty-six thousand, nine hundred forty-five".