68007746671 has 4 divisors (see below), whose sum is σ = 68012764144. Its totient is φ = 68002729200.

The previous prime is 68007746641. The next prime is 68007746693. The reversal of 68007746671 is 17664770086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68007746671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68007746621) 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, 2488350 + ... + 2515531.

It is an arithmetic number, because the mean of its divisors is an integer number (17003191036).

Almost surely, 2^68007746671 is an apocalyptic number.

68007746671 is a deficient number, since it is larger than the sum of its proper divisors (5017473).

68007746671 is a wasteful number, since it uses less digits than its factorization.

68007746671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017472.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 68007746671 in words is "sixty-eight billion, seven million, seven hundred forty-six thousand, six hundred seventy-one".