66442108068 has 36 divisors (see below), whose sum is σ = 191943868480. Its totient is φ = 18983459376.

The previous prime is 66442108039. The next prime is 66442108091. The reversal of 66442108068 is 86080124466.

66442108068 is a `hidden beast` number, since 66 + 442 + 10 + 80 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131829328 + ... + 131829831.

Almost surely, 2^66442108068 is an apocalyptic number.

It is an amenable number.

66442108068 is an abundant number, since it is smaller than the sum of its proper divisors (125501760412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66442108068 is a wasteful number, since it uses less digits than its factorization.

66442108068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263659176 (or 263659171 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 66442108068 in words is "sixty-six billion, four hundred forty-two million, one hundred eight thousand, sixty-eight".