68507668 has 6 divisors (see below), whose sum is σ = 119888426. Its totient is φ = 34253832.

The previous prime is 68507651. The next prime is 68507693. The reversal of 68507668 is 86670586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68095504 + 412164 = 8252^2 + 642^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8563455 + ... + 8563462.

Almost surely, 2^68507668 is an apocalyptic number.

It is an amenable number.

68507668 is a deficient number, since it is larger than the sum of its proper divisors (51380758).

68507668 is a wasteful number, since it uses less digits than its factorization.

68507668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17126921 (or 17126919 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 68507668 is about 8276.9359064813. The cubic root of 68507668 is about 409.1787407492.

The spelling of 68507668 in words is "sixty-eight million, five hundred seven thousand, six hundred sixty-eight".