78866425 has 48 divisors (see below), whose sum is σ = 114671232. Its totient is φ = 53222400.

The previous prime is 78866419. The next prime is 78866441. The reversal of 78866425 is 52466887.

It is not a de Polignac number, because 78866425 - 2⁵ = 78866393 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 233857 + ... + 234193.

It is an arithmetic number, because the mean of its divisors is an integer number (2388984).

Almost surely, 2^78866425 is an apocalyptic number.

It is an amenable number.

78866425 is a deficient number, since it is larger than the sum of its proper divisors (35804807).

78866425 is a wasteful number, since it uses less digits than its factorization.

78866425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 413 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 78866425 is about 8880.6770575221. The cubic root of 78866425 is about 428.8420712491.

The spelling of 78866425 in words is "seventy-eight million, eight hundred sixty-six thousand, four hundred twenty-five".