67778318955 has 16 divisors (see below), whose sum is σ = 114152958720. Its totient is φ = 34245887328.

The previous prime is 67778318941. The next prime is 67778318957. The reversal of 67778318955 is 55981387776.

It is not a de Polignac number, because 67778318955 - 2¹⁰ = 67778317931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67778318957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118909047 + ... + 118909616.

It is an arithmetic number, because the mean of its divisors is an integer number (7134559920).

Almost surely, 2^67778318955 is an apocalyptic number.

67778318955 is a deficient number, since it is larger than the sum of its proper divisors (46374639765).

67778318955 is a wasteful number, since it uses less digits than its factorization.

67778318955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237818690.

The product of its digits is 88905600, while the sum is 66.

The spelling of 67778318955 in words is "sixty-seven billion, seven hundred seventy-eight million, three hundred eighteen thousand, nine hundred fifty-five".