2578478766 has 32 divisors (see below), whose sum is σ = 5287838976. Its totient is φ = 837720000.

The previous prime is 2578478743. The next prime is 2578478767. The reversal of 2578478766 is 6678748752.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578478767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283591 + ... + 292541.

It is an arithmetic number, because the mean of its divisors is an integer number (165244968).

Almost surely, 2^2578478766 is an apocalyptic number.

2578478766 is an abundant number, since it is smaller than the sum of its proper divisors (2709360210).

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

2578478766 is a wasteful number, since it uses less digits than its factorization.

2578478766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10168.

The product of its digits is 31610880, while the sum is 60.

The square root of 2578478766 is about 50778.7235562297. The cubic root of 2578478766 is about 1371.2643532381.

The spelling of 2578478766 in words is "two billion, five hundred seventy-eight million, four hundred seventy-eight thousand, seven hundred sixty-six".