2664878 has 4 divisors (see below), whose sum is σ = 3997320. Its totient is φ = 1332438.

The previous prime is 2664859. The next prime is 2664889. The reversal of 2664878 is 8784662.

2664878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8784662 = 2 ⋅4392331.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 666218 + ... + 666221.

It is an arithmetic number, because the mean of its divisors is an integer number (999330).

2^2664878 is an apocalyptic number.

2664878 is a deficient number, since it is larger than the sum of its proper divisors (1332442).

2664878 is a wasteful number, since it uses less digits than its factorization.

2664878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332441.

The product of its digits is 129024, while the sum is 41.

The square root of 2664878 is about 1632.4454049064. The cubic root of 2664878 is about 138.6412431304.

The spelling of 2664878 in words is "two million, six hundred sixty-four thousand, eight hundred seventy-eight".