68666056 has 16 divisors (see below), whose sum is σ = 128857500. Its totient is φ = 34304064.

The previous prime is 68666047. The next prime is 68666069. The reversal of 68666056 is 65066686.

It can be written as a sum of positive squares in 2 ways, for example, as 67732900 + 933156 = 8230^2 + 966^2 .

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 3 ways as a sum of consecutive naturals, for example, 9070 + ... + 14818.

Almost surely, 2^68666056 is an apocalyptic number.

It is an amenable number.

68666056 is a deficient number, since it is larger than the sum of its proper divisors (60191444).

68666056 is a wasteful number, since it uses less digits than its factorization.

68666056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7248 (or 7244 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 68666056 is about 8286.4984160983. The cubic root of 68666056 is about 409.4938350188.

The spelling of 68666056 in words is "sixty-eight million, six hundred sixty-six thousand, fifty-six".