78606725 has 12 divisors (see below), whose sum is σ = 103206564. Its totient is φ = 59185920.

The previous prime is 78606721. The next prime is 78606739. The reversal of 78606725 is 52760687.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5230369 + 73376356 = 2287^2 + 8566^2 .

It is not a de Polignac number, because 78606725 - 2² = 78606721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78606721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92054 + ... + 92903.

It is an arithmetic number, because the mean of its divisors is an integer number (8600547).

Almost surely, 2^78606725 is an apocalyptic number.

It is an amenable number.

78606725 is a deficient number, since it is larger than the sum of its proper divisors (24599839).

78606725 is a wasteful number, since it uses less digits than its factorization.

78606725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184984 (or 184979 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 78606725 is about 8866.0433678163. The cubic root of 78606725 is about 428.3708409204.

The spelling of 78606725 in words is "seventy-eight million, six hundred six thousand, seven hundred twenty-five".