67878693376064 has 14 divisors (see below), whose sum is σ = 134696782168254. Its totient is φ = 33939346688000.

The previous prime is 67878693376049. The next prime is 67878693376069. The reversal of 67878693376064 is 46067339687876.

It can be written as a sum of positive squares in only one way, i.e., 65217253518400 + 2661439857664 = 8075720^2 + 1631392^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67878693376064.

It is not an unprimeable number, because it can be changed into a prime (67878693376069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530302291937 + ... + 530302292064.

Almost surely, 2^{67878693376064} is an apocalyptic number.

67878693376064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67878693376064 is a deficient number, since it is larger than the sum of its proper divisors (66818088792190).

67878693376064 is a wasteful number, since it uses less digits than its factorization.

67878693376064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060604584013 (or 1060604584003 counting only the distinct ones).

The product of its (nonzero) digits is 9217732608, while the sum is 80.

The spelling of 67878693376064 in words is "sixty-seven trillion, eight hundred seventy-eight billion, six hundred ninety-three million, three hundred seventy-six thousand, sixty-four".