68686525 has 12 divisors (see below), whose sum is σ = 85471092. Its totient is φ = 54755840.

The previous prime is 68686517. The next prime is 68686531. The reversal of 68686525 is 52568686.

It can be written as a sum of positive squares in 6 ways, for example, as 558009 + 68128516 = 747^2 + 8254^2 .

It is not a de Polignac number, because 68686525 - 2³ = 68686517 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2637 + ... + 12013.

It is an arithmetic number, because the mean of its divisors is an integer number (7122591).

Almost surely, 2^68686525 is an apocalyptic number.

It is an amenable number.

68686525 is a deficient number, since it is larger than the sum of its proper divisors (16784567).

68686525 is a wasteful number, since it uses less digits than its factorization.

68686525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9680 (or 9675 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 68686525 is about 8287.7334054614. The cubic root of 68686525 is about 409.5345203155.

The spelling of 68686525 in words is "sixty-eight million, six hundred eighty-six thousand, five hundred twenty-five".