78425266 has 8 divisors (see below), whose sum is σ = 119857644. Its totient is φ = 38472720.

The previous prime is 78425261. The next prime is 78425317. The reversal of 78425266 is 66252487.

It can be written as a sum of positive squares in 2 ways, for example, as 66667225 + 11758041 = 8165^2 + 3429^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78425261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369825 + ... + 370036.

Almost surely, 2^78425266 is an apocalyptic number.

78425266 is a deficient number, since it is larger than the sum of its proper divisors (41432378).

78425266 is a wasteful number, since it uses less digits than its factorization.

78425266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739916.

The product of its digits is 161280, while the sum is 40.

The square root of 78425266 is about 8855.8040854572. The cubic root of 78425266 is about 428.0409639949.

The spelling of 78425266 in words is "seventy-eight million, four hundred twenty-five thousand, two hundred sixty-six".