66116204068 has 6 divisors (see below), whose sum is σ = 115703357126. Its totient is φ = 33058102032.

The previous prime is 66116204059. The next prime is 66116204069. The reversal of 66116204068 is 86040261166.

It is a happy number.

66116204068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49435964964 + 16680239104 = 222342^2 + 129152^2 .

It is a super-2 number, since 2×66116204068² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66116204068.

It is not an unprimeable number, because it can be changed into a prime (66116204069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8264525505 + ... + 8264525512.

Almost surely, 2^66116204068 is an apocalyptic number.

It is an amenable number.

66116204068 is a deficient number, since it is larger than the sum of its proper divisors (49587153058).

66116204068 is a wasteful number, since it uses less digits than its factorization.

66116204068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16529051021 (or 16529051019 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 66116204068 in words is "sixty-six billion, one hundred sixteen million, two hundred four thousand, sixty-eight".