66868114538 has 8 divisors (see below), whose sum is σ = 101189801988. Its totient is φ = 33138180544.

The previous prime is 66868114519. The next prime is 66868114559. The reversal of 66868114538 is 83541186866.

It can be written as a sum of positive squares in 2 ways, for example, as 66867236569 + 877969 = 258587^2 + 937^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147938081 + ... + 147938532.

Almost surely, 2^66868114538 is an apocalyptic number.

66868114538 is a deficient number, since it is larger than the sum of its proper divisors (34321687450).

66868114538 is a wasteful number, since it uses less digits than its factorization.

66868114538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295876728.

The product of its digits is 6635520, while the sum is 56.

The spelling of 66868114538 in words is "sixty-six billion, eight hundred sixty-eight million, one hundred fourteen thousand, five hundred thirty-eight".