2665878 has 16 divisors (see below), whose sum is σ = 5347776. Its totient is φ = 885960.

The previous prime is 2665867. The next prime is 2665879. The reversal of 2665878 is 8785662.

2665878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2¹⁴ + 6⁵ + 6⁶ + 5⁹ + 8⁶ + 7⁶ + 8⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2665879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3513 + ... + 4203.

It is an arithmetic number, because the mean of its divisors is an integer number (334236).

2^2665878 is an apocalyptic number.

2665878 is an abundant number, since it is smaller than the sum of its proper divisors (2681898).

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

2665878 is a wasteful number, since it uses less digits than its factorization.

2665878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339.

The product of its digits is 161280, while the sum is 42.

The square root of 2665878 is about 1632.7516651347. The cubic root of 2665878 is about 138.6585827491.

The spelling of 2665878 in words is "two million, six hundred sixty-five thousand, eight hundred seventy-eight".