78218582341066 has 16 divisors (see below), whose sum is σ = 119545974722664. Its totient is φ = 38369978023104.

The previous prime is 78218582341063. The next prime is 78218582341087. The reversal of 78218582341066 is 66014328581287.

It can be written as a sum of positive squares in 4 ways, for example, as 61653511400625 + 16565070940441 = 7851975^2 + 4070021^2 .

It is a super-2 number, since 2×78218582341066² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78218582340995 and 78218582341013.

It is not an unprimeable number, because it can be changed into a prime (78218582341063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10562925 + ... + 16371088.

Almost surely, 2^{78218582341066} is an apocalyptic number.

78218582341066 is a deficient number, since it is larger than the sum of its proper divisors (41327392381598).

78218582341066 is a wasteful number, since it uses less digits than its factorization.

78218582341066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26961465.

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 78218582341066 in words is "seventy-eight trillion, two hundred eighteen billion, five hundred eighty-two million, three hundred forty-one thousand, sixty-six".