68668005907 has 4 divisors (see below), whose sum is σ = 69334685680. Its totient is φ = 68001326136.

The previous prime is 68668005899. The next prime is 68668005943. The reversal of 68668005907 is 70950086686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70950086686 = 2 ⋅35475043343.

It is a cyclic number.

It is not a de Polignac number, because 68668005907 - 2³ = 68668005899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68668008907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333339732 + ... + 333339937.

It is an arithmetic number, because the mean of its divisors is an integer number (17333671420).

Almost surely, 2^68668005907 is an apocalyptic number.

68668005907 is a deficient number, since it is larger than the sum of its proper divisors (666679773).

68668005907 is a wasteful number, since it uses less digits than its factorization.

68668005907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666679772.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 68668005907 in words is "sixty-eight billion, six hundred sixty-eight million, five thousand, nine hundred seven".