68720625 has 60 divisors (see below), whose sum is σ = 130770640. Its totient is φ = 34668000.

The previous prime is 68720569. The next prime is 68720629. The reversal of 68720625 is 52602786.

68720625 is a `hidden beast` number, since 6 + 8 + 7 + 20 + 625 = 666.

It is not a de Polignac number, because 68720625 - 2⁷ = 68720497 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68720625.

It is not an unprimeable number, because it can be changed into a prime (68720629) 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 59 ways as a sum of consecutive naturals, for example, 106554 + ... + 107196.

Almost surely, 2^68720625 is an apocalyptic number.

It is an amenable number.

68720625 is a deficient number, since it is larger than the sum of its proper divisors (62050015).

68720625 is a wasteful number, since it uses less digits than its factorization.

68720625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 68720625 is about 8289.7904074832. The cubic root of 68720625 is about 409.6022813829.

It can be divided in two parts, 687 and 20625, that added together give a palindrome (21312).

The spelling of 68720625 in words is "sixty-eight million, seven hundred twenty thousand, six hundred twenty-five".