78766625 has 16 divisors (see below), whose sum is σ = 112344960. Its totient is φ = 54010800.

The previous prime is 78766603. The next prime is 78766663. The reversal of 78766625 is 52666787.

It is not a de Polignac number, because 78766625 - 2¹⁴ = 78750241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78766625.

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 in 15 ways as a sum of consecutive naturals, for example, 44135 + ... + 45884.

It is an arithmetic number, because the mean of its divisors is an integer number (7021560).

Almost surely, 2^78766625 is an apocalyptic number.

It is an amenable number.

78766625 is a deficient number, since it is larger than the sum of its proper divisors (33578335).

78766625 is an equidigital number, since it uses as much as digits as its factorization.

78766625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90041 (or 90031 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 78766625 is about 8875.0563378494. The cubic root of 78766625 is about 428.6611049116.

The spelling of 78766625 in words is "seventy-eight million, seven hundred sixty-six thousand, six hundred twenty-five".