2555166 has 8 divisors (see below), whose sum is σ = 5110344. Its totient is φ = 851720.

The previous prime is 2555159. The next prime is 2555167. The reversal of 2555166 is 6615552.

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

2555166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212925 + ... + 212936.

It is an arithmetic number, because the mean of its divisors is an integer number (638793).

2^2555166 is an apocalyptic number.

2555166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2555166 is a wasteful number, since it uses less digits than its factorization.

2555166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425866.

The product of its digits is 9000, while the sum is 30.

The square root of 2555166 is about 1598.4886612047. The cubic root of 2555166 is about 136.7119170669.

It can be divided in two parts, 25551 and 66, that multiplied together give a triangular number (1686366 = T₁₈₃₆).

The spelling of 2555166 in words is "two million, five hundred fifty-five thousand, one hundred sixty-six".