67699881551 has 4 divisors (see below), whose sum is σ = 67891666272. Its totient is φ = 67508096832.

The previous prime is 67699881547. The next prime is 67699881569. The reversal of 67699881551 is 15518899676.

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

It is a cyclic number.

It is not a de Polignac number, because 67699881551 - 2² = 67699881547 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 (67699881581) 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, 95891831 + ... + 95892536.

It is an arithmetic number, because the mean of its divisors is an integer number (16972916568).

Almost surely, 2^67699881551 is an apocalyptic number.

67699881551 is a deficient number, since it is larger than the sum of its proper divisors (191784721).

67699881551 is a wasteful number, since it uses less digits than its factorization.

67699881551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191784720.

The product of its digits is 32659200, while the sum is 65.

The spelling of 67699881551 in words is "sixty-seven billion, six hundred ninety-nine million, eight hundred eighty-one thousand, five hundred fifty-one".