67655505671 has 4 divisors (see below), whose sum is σ = 72859775352. Its totient is φ = 62451235992.

The previous prime is 67655505647. The next prime is 67655505713. The reversal of 67655505671 is 17650555676.

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-67655505671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67655505611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2602134821 + ... + 2602134846.

It is an arithmetic number, because the mean of its divisors is an integer number (18214943838).

Almost surely, 2^67655505671 is an apocalyptic number.

67655505671 is a deficient number, since it is larger than the sum of its proper divisors (5204269681).

67655505671 is a wasteful number, since it uses less digits than its factorization.

67655505671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204269680.

The product of its (nonzero) digits is 6615000, while the sum is 53.

The spelling of 67655505671 in words is "sixty-seven billion, six hundred fifty-five million, five hundred five thousand, six hundred seventy-one".