67106663561 has 8 divisors (see below), whose sum is σ = 76823987520. Its totient is φ = 57422004048.

The previous prime is 67106663417. The next prime is 67106663567. The reversal of 67106663561 is 16536660176.

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-67106663561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67106663567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8161706 + ... + 8169923.

It is an arithmetic number, because the mean of its divisors is an integer number (9602998440).

Almost surely, 2^67106663561 is an apocalyptic number.

It is an amenable number.

67106663561 is a deficient number, since it is larger than the sum of its proper divisors (9717323959).

67106663561 is a wasteful number, since it uses less digits than its factorization.

67106663561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16332223.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 67106663561 in words is "sixty-seven billion, one hundred six million, six hundred sixty-three thousand, five hundred sixty-one".