67054776778 has 64 divisors (see below), whose sum is σ = 121834523520. Its totient is φ = 27317606400.

The previous prime is 67054776739. The next prime is 67054776779. The reversal of 67054776778 is 87767745076.

It is a super-2 number, since 2×67054776778² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67054776779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 749413 + ... + 834103.

It is an arithmetic number, because the mean of its divisors is an integer number (1903664430).

Almost surely, 2^67054776778 is an apocalyptic number.

67054776778 is a deficient number, since it is larger than the sum of its proper divisors (54779746742).

67054776778 is a wasteful number, since it uses less digits than its factorization.

67054776778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84823.

The product of its (nonzero) digits is 96808320, while the sum is 64.

The spelling of 67054776778 in words is "sixty-seven billion, fifty-four million, seven hundred seventy-six thousand, seven hundred seventy-eight".