67661111855 has 16 divisors (see below), whose sum is σ = 82838251584. Its totient is φ = 53039028480.

The previous prime is 67661111839. The next prime is 67661111857. The reversal of 67661111855 is 55811116676.

It is not a de Polignac number, because 67661111855 - 2⁴ = 67661111839 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 (67661111857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341534 + ... + 501963.

It is an arithmetic number, because the mean of its divisors is an integer number (5177390724).

Almost surely, 2^67661111855 is an apocalyptic number.

67661111855 is a deficient number, since it is larger than the sum of its proper divisors (15177139729).

67661111855 is a wasteful number, since it uses less digits than its factorization.

67661111855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843826.

The product of its digits is 302400, while the sum is 47.

The spelling of 67661111855 in words is "sixty-seven billion, six hundred sixty-one million, one hundred eleven thousand, eight hundred fifty-five".