2780066 has 8 divisors (see below), whose sum is σ = 4184364. Its totient is φ = 1385280.

The previous prime is 2780053. The next prime is 2780077. The reversal of 2780066 is 6600872.

2780066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2337841 + 442225 = 1529^2 + 665^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 1595 + ... + 2846.

2^2780066 is an apocalyptic number.

2780066 is a deficient number, since it is larger than the sum of its proper divisors (1404298).

2780066 is a wasteful number, since it uses less digits than its factorization.

2780066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 2780066 is about 1667.3529920206. The cubic root of 2780066 is about 140.6106995170.

The spelling of 2780066 in words is "two million, seven hundred eighty thousand, sixty-six".