68686146 has 24 divisors (see below), whose sum is σ = 150141420. Its totient is φ = 22692096.

The previous prime is 68686133. The next prime is 68686147. The reversal of 68686146 is 64168686.

It can be written as a sum of positive squares in 2 ways, for example, as 67420521 + 1265625 = 8211^2 + 1125^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68686147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14851 + ... + 18918.

Almost surely, 2^68686146 is an apocalyptic number.

68686146 is an abundant number, since it is smaller than the sum of its proper divisors (81455274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68686146 is a wasteful number, since it uses less digits than its factorization.

68686146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33890 (or 33887 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 68686146 is about 8287.7105403121. The cubic root of 68686146 is about 409.5337670680.

The spelling of 68686146 in words is "sixty-eight million, six hundred eighty-six thousand, one hundred forty-six".