2555766 has 64 divisors (see below), whose sum is σ = 6220800. Its totient is φ = 775008.

The previous prime is 2555753. The next prime is 2555767. The reversal of 2555766 is 6675552.

It is a self number, because there is not a number n which added to its sum of digits gives 2555766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48196 + ... + 48248.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

2^2555766 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2555766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110400).

2555766 is an abundant number, since it is smaller than the sum of its proper divisors (3665034).

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

2555766 is a wasteful number, since it uses less digits than its factorization.

2555766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 124 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 2555766 is about 1598.6763274659. The cubic root of 2555766 is about 136.7226170542.

It can be divided in two parts, 2555 and 766, that added together give a triangular number (3321 = T₈₁).

The spelling of 2555766 in words is "two million, five hundred fifty-five thousand, seven hundred sixty-six".