2778966 has 12 divisors (see below), whose sum is σ = 6021132. Its totient is φ = 926316.

The previous prime is 2778917. The next prime is 2778967. The reversal of 2778966 is 6698772.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778967) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77176 + ... + 77211.

It is an arithmetic number, because the mean of its divisors is an integer number (501761).

2^2778966 is an apocalyptic number.

2778966 is an abundant number, since it is smaller than the sum of its proper divisors (3242166).

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

2778966 is a wasteful number, since it uses less digits than its factorization.

2778966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154395 (or 154392 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 2778966 is about 1667.0230952209. The cubic root of 2778966 is about 140.5921517351.

The spelling of 2778966 in words is "two million, seven hundred seventy-eight thousand, nine hundred sixty-six".