67608949991 has 8 divisors (see below), whose sum is σ = 77637072000. Its totient is φ = 58227803640.

The previous prime is 67608949963. The next prime is 67608950083. The reversal of 67608949991 is 19994980676.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67608949991 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 (67608949921) 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, 161743691 + ... + 161744108.

It is an arithmetic number, because the mean of its divisors is an integer number (9704634000).

Almost surely, 2^67608949991 is an apocalyptic number.

67608949991 is a deficient number, since it is larger than the sum of its proper divisors (10028122009).

67608949991 is a wasteful number, since it uses less digits than its factorization.

67608949991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323487829.

The product of its (nonzero) digits is 52907904, while the sum is 68.

The spelling of 67608949991 in words is "sixty-seven billion, six hundred eight million, nine hundred forty-nine thousand, nine hundred ninety-one".