2566278 has 48 divisors (see below), whose sum is σ = 6538896. Its totient is φ = 717120.

The previous prime is 2566261. The next prime is 2566279. The reversal of 2566278 is 8726652.

2566278 is a `hidden beast` number, since 25 + 6 + 627 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2076 + ... + 3072.

It is an arithmetic number, because the mean of its divisors is an integer number (136227).

2^2566278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2566278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3269448).

2566278 is an abundant number, since it is smaller than the sum of its proper divisors (3972618).

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

2566278 is a wasteful number, since it uses less digits than its factorization.

2566278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1026 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2566278 is about 1601.9606736746. The cubic root of 2566278 is about 136.9098097491.

The spelling of 2566278 in words is "two million, five hundred sixty-six thousand, two hundred seventy-eight".