2782166 has 4 divisors (see below), whose sum is σ = 4173252. Its totient is φ = 1391082.

The previous prime is 2782163. The next prime is 2782183. The reversal of 2782166 is 6612872.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2782163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695540 + ... + 695543.

It is an arithmetic number, because the mean of its divisors is an integer number (1043313).

2^2782166 is an apocalyptic number.

2782166 is a deficient number, since it is larger than the sum of its proper divisors (1391086).

2782166 is a wasteful number, since it uses less digits than its factorization.

2782166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391085.

The product of its digits is 8064, while the sum is 32.

The square root of 2782166 is about 1667.9826138183. The cubic root of 2782166 is about 140.6460953374.

The spelling of 2782166 in words is "two million, seven hundred eighty-two thousand, one hundred sixty-six".