67716307691 has 8 divisors (see below), whose sum is σ = 67835679744. Its totient is φ = 67597021800.

The previous prime is 67716307657. The next prime is 67716307709. The reversal of 67716307691 is 19670361776.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67716307691 - 2⁶ = 67716307627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67716307991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1666466 + ... + 1706616.

It is an arithmetic number, because the mean of its divisors is an integer number (8479459968).

Almost surely, 2^67716307691 is an apocalyptic number.

67716307691 is a deficient number, since it is larger than the sum of its proper divisors (119372053).

67716307691 is a wasteful number, since it uses less digits than its factorization.

67716307691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43081.

The product of its (nonzero) digits is 2000376, while the sum is 53.

The spelling of 67716307691 in words is "sixty-seven billion, seven hundred sixteen million, three hundred seven thousand, six hundred ninety-one".