68051668 has 6 divisors (see below), whose sum is σ = 119090426. Its totient is φ = 34025832.

The previous prime is 68051657. The next prime is 68051713. The reversal of 68051668 is 86615086.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67930564 + 121104 = 8242^2 + 348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68051668.

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 as a sum of consecutive naturals, namely, 8506455 + ... + 8506462.

Almost surely, 2^68051668 is an apocalyptic number.

It is an amenable number.

68051668 is a deficient number, since it is larger than the sum of its proper divisors (51038758).

68051668 is a wasteful number, since it uses less digits than its factorization.

68051668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17012921 (or 17012919 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68051668 is about 8249.3434890299. The cubic root of 68051668 is about 408.2688619393.

The spelling of 68051668 in words is "sixty-eight million, fifty-one thousand, six hundred sixty-eight".